Yellowstone Visitor Guide 2019
Are you ready for your Yellowstone adventure?
Place to stay Travel time Essentials Inside Hotels and campgrounds fill up Plan plenty of time to get to Top 5 sites to see: 2 Welcome quickly, both inside and around your destination. Yellowstone 1. Old Faithful Geyser 4 Camping the park. Make sure you have is worth pulling over for! 2. The Grand Canyon of the secured lodging before you make Plan a minimum of 40 minutes Yellowstone River 5 Activities other plans. If you do not, you to travel between junctions or 3. Yellowstone Lake 7 Suggested itineraries may have to drive several hours visitor service areas on the Grand 4. Mammoth Hot Springs away from the park to the nearest Loop Road. The speed limit in Terraces 8 Famously hot features available hotel or campsite. Yellowstone is 45 mph (73 kph) 5. Hayden or Lamar valleys 9 Wild lands and wildlife except where posted slower. 10 Area guides 15 Translations Area guides....pgs 10–14 Reservations...... pg 2 Road map...... pg 16 16 Yellowstone roads map Emergency Dial 911 Information line 307-344-7381 TTY 307-344-2386 Park entrance radio 1610 AM = Medical services Yellowstone is on 911 emergency service, including ambulances. Medical services are available year round at Mammoth Clinic (307- 344-7965), except some holidays. Services are also offered at Lake Clinic (307‑242‑7241) and at Old Faithful Clinic (307‑545‑7325) during the summer visitor season.
Welcome to Yellowstone National Park
Yellowstone is a special place, and very different from your home. Like any grand adventure, your Yellowstone journey will take you to impressive new locations and introduce you to new experiences. There are different risks here than you may have faced before.You are responsible for your own safety.
We need your help to preserve the wildlife, natural features, and cultural treasures that bring so many visitors to Yellowstone. The park rules protect you and also protect the park. Follow the ô Accessibility park rules for a safe and enjoyable visit. Please be a positive part of the Yellowstone experience. A printed guide is available at all visitor centers More guidance is described inside and online at www.nps.gov/yell/planyourvisit/rules.htm. and on the park website. To arrange for an ASL Yellowstone National Park is assisted in fulfilling our mission by our official non-profit partner, interpreter for NPS ranger-led programs, call Yellowstone Forever. Proceeds from Yellowstone Forever educational bookstores, Institute, and 307‑344‑2251 at least three weeks in advance. philanthropic efforts support priority park projects and visitor education. Find more information Qualified service animals are welcome at Yellowstone.org or call (406) 848-2400. throughout the park and in all park facilities. However, they must be leashed and under your Park mission: Preserved within Yellowstone National Park are Old Faithful and the majority control at all times. of the world’s geysers and hot springs. An outstanding mountain wildland with clean water and air, Yellowstone is home of the grizzly bear and wolf and free-ranging herds of bison and elk. Firearms Centuries-old sites and historic buildings that reflect the unique heritage of America’s first national Firearms are allowed in national parks park are also protected. Yellowstone National Park serves as a model and inspiration for national pursuant to state and federal regulations. They parks throughout the world. are prohibited in facilities where signs are posted, such as visitor centers, government offices, and some concession operations. Lodging, campground, Discharge of firearms is prohibited. Possession and tour reservations and use of weapons, such as air guns, bows and arrows, spears and slingshots, is also prohib- As one of Yellowstone’s official concession ited. Details are available at www.nps.gov/ companies, Yellowstone National Park Lodges yell/parkmgmt/lawsandpolicies.htm offers lodging, camping, dining, and a variety of tours and activities. In summer, visitors can enjoy photo safaris, partial or full-day tours, Launching, landing, or operating horseback and stagecoach rides, and boating unmanned aircraft (drones) on and fishing adventures. In winter, there are lands and waters administered by partial or full-day tours by heated snowcoach, the National Park Service is prohibited. skiing, and snowshoe adventures.
Reservations are available at park hotels and at: ? Lost and found 307-344-7311 (TDD: 307-344-5395) YellowstoneNationalParkLodges.com Call 307-344-5387 to report or retrieve items [email protected] lost in lodging facilities. In other parts of the park, call 307-344-2109. P.O. Box 165, Yellowstone NP, WY 82190 2 100 yards (91 m)
Store food securely 25 yards (23 m) Do not feed any wildlife, including small mammals and birds. Consuming human food is unhealthy and encourages aggressive behavior that may require animals to be destroyed. ö Watching wildlife For your safety, and the safety of the animals please obey park rules: All food, trash, and scented items must be kept Watching wildlife in Yellowstone can be an inaccessible to bears at all times. Tents, truck • Stay at least 100 yards (91m) away from amazing experience—unparalleled in the lower beds, and picnic tables are not secure. In some bears and wolves, and at least 25 yards 48 states. All the large mammals present when areas, ravens have learned how to unzip packs (23 m) away from all other wild animals. Yellowstone became a park are here today: and scatter the contents. grizzly and black bears, wolves, mountain • If an animal moves closer to you, you must lions, elk, bison, pronghorn, moose, and move to maintain the appropriate distance. None of these items, even if clean and empty, bighorn sheep. You may also see a variety of may be left unattended at any time: • Do not surround, crowd, or disrupt an birds, including bald eagles. animal’s path of movement. • Water and beverage • Food, including containers condiments, even if Looking for wildlife? • If other visitors put you or wildlife in danger, • Cooking or eating in containers • To conserve energy, most animals are active leave the area and notify a park ranger. utensils • Cosmetics and in the cool of dawn or dusk. • Spotlighting, or viewing animals with • Stoves and grills toiletries • Animals are everywhere in the park, but it is artificial light, is illegal. • Coolers and ice • Pet food and bowls easier to see them in open meadows and chests • Pails, buckets, and sagebrush than in dense forest. • Calling to attract wildlife is illegal. You may • Garbage—bagged wash basins • Find a place with a broad view for your not bugle to elk, howl at wolves, or make bird or not binoculars or spotting scope, and be calls of any kind. prepared to wait. • Tracking wildlife with electronic equipment is not permitted.
Cell phone service Park Tip Line • To report a Cell phone service is very limited in crime or criminal activity please the park and surrounding areas. General cell call 307-344-2132. Leave as much coverage areas are marked on the park map detail as you can. Remain anonymous, or (back cover). Emergency 911 service by cell leave a name and number. phone is only available in coverage areas. Text 911 is not available in Yellowstone. Smoking is prohibited During peak hours and periods of heavy in geyser visitation, the cellular network may be very basins, on trails, in buildings, or slow. Your provider may or may not roam on within 25 feet (7.6 m) of entrances. networks in Yellowstone. As a courtesy to ` Pets others, please silence your mobile device while Pets are not allowed on trails or boardwalks, enjoying Yellowstone. Follow @YellowstoneNPS in the backcountry, or in hydrothermal basins. Where allowed, pets must be leashed and Wi-Fi remain within 100 feet (30.5 m) of a road or Wi-Fi is available to visitors at the Mammoth parking area. Hotel and the Old Faithful Snow Lodge, Lake Do not leave a pet unattended, tied to an object, Lodge cafeteria, and the Canyon and Grant or without adequate food, water, shade, venti- lodges for a fee. The Horace M. Albright lation, or other basic needs. Owners must bag Visitor Center in Mammoth Hot Springs and dispose of pet waste. We recommend that has free Wi-Fi. Data speeds are very limited someone in your group remain with your pet at outside of Mammoth Hot Springs. all times to personally ensure their well being. 3 Make Memories to Last a Lifetime
− Camping NPS-operated campgrounds Campsites are first-come, first-served at Mammoth, Norris, Indian Creek, Lewis Lake, Pebble Creek, Slough Creek, and Tower Fall. Arrive early to obtain a site, campgrounds fill quickly. Reservable sites Reserve sites at Canyon, Bridge Bay, Madison, and Grant Village through Yellowstone National Park Lodges at 307-344-7311.
Fishing Bridge RV Park is CLOSED for the 2019 season. No overflow camping There are no overflow camping areas available in Yellowstone. No camping or overnight vehicle parking is allowed in pullouts, parking areas, picnic grounds, or any place other than a designated campground. Additional camping Discounts may be available in neighboring communities. Holders of Senior and Access passes receive a Check-in and check-out 50 percent discount on camping fees. Registration desks at reservable campgrounds Quiet hours are open 7 am to 10 pm during peak season, From 10 pm to 6 am, no loud audio devices or and 8 am to 9 pm during early and late season. other noise disturbances are allowed. Check-out time is 11 am. Group camping Length of stay Group camping (tents only) is available at Camping is limited to 14 days from July Madison, Grant, and Bridge Bay for organized 1 through Labor Day (first Monday in groups with a designated leader. Fees range September) and 30 days the rest of the year. from $144.61 to $422.71 per night, depending Key to campground features on group size. Advance reservations are ∆ Sites you can reserve required at 1-307-344-5437 or Ω Rate does not include tax or utility pass-through Campfires are allowed only in [email protected]. ‡ Site with full hook ups , designated grills or rings in park A Accessible sites available campgrounds, some picnic areas, and Food storage boxes F Flush toilets specific backcountry campsites. Campfires Food storage boxes are available at each of V Vault toilets must be extinguished before leaving them the campsites at Indian Creek, Norris, Pebble unattended. S/L Pay showers/laundry onsite Creek, Slough Creek, Tower Fall, and Lewis 2S Two showers included each night Lake campgrounds. Many campsites in other DS Dump station campgrounds are also equipped with bear- G Generators allowed 8 am to 8 pm proof storage boxes.
In order of opening Dates* Rate Sites Elev (ft) Features RV sites Mammoth All year $20 85 6,200 A, F, G Most are pull-through Madison ∆ 4/26–10/13 $26 Ω 278 6,800 A, F, DS, G Call for availability and reservations Fishing Bridge RV ∆ CLOSED $47.75 Ω 346 7,800 F, S/L, 2S, DS, G, ‡ under construction in 2019 Norris 5/17–9/29 $20 112 7,500 A, F, G 2 sites are 50 ft (signed), 5 sites are 30 ft Bridge Bay ∆ 5/17–9/22 $26 Ω 432 7,800 A, F, DS, G Call for availability and reservations Tower Fall 5/24–9/29 $15 31 6,600 A, V All sites are 30 ft or less. Has hairpin curve Canyon ∆ 5/24–9/22 $31 Ω 273 7,900 A, F, S/L, 2S, DS, G Call for availability and reservations Grant Village ∆ 6/7–9/15 $31 Ω 430 7,800 A, F, S/L, 2S, DS, G Call for availability and reservations Indian Creek 6/14–9/9 $15 70 7,300 A, V 10 sites are 35 ft, 35 sites are 30 ft Pebble Creek 6/15–9/29 $15 27 6,900 A, V Some long pull-throughs Slough Creek 6/15-10/15 $15 16 6,250 A, V 14 sites at 30 ft – walk first to assess sites Lewis Lake 6/15 –11/ 3 $15 85 7,800 A, V All sites are 25 ft or less
*Campgrounds open at 8 am of first date listed and close for the season at 11 am of last date listed. 4 > Fishing season ] Boating General fishing seasonopens May 25 and The boating season opens May 25 and closes ç Backcountry camping closes November 3, 2019. Some areas remain November 3, 2019. All watercraft (motorized Overnight backcountry camping is allowed in closed until July 15. Fishing permits are required boats, non-motorized boats, and float tubes) designated sites and requires a permit. Permits in Yellowstone, state-issued fishing permits are must have a permit and be inspected for can be obtained up to two days before the not valid within the park. Anglers 16 years or aquatic invasive species (AIS) by park staff. start of your trip at any backcountry office. older need a permit; younger children can fish Any watercraft suspected Permits are free prior to Memorial Day. From for free with a permitted adult. of harboring AIS will be subject to a non-chemical decontamination treatment. Memorial Day through September 10, a Fishing regulations in Yellowstone protect per-person, per-night fee applies. the unique values of the park ecosystem and Motorized boating is allowed on Lewis Lake • Backpackers and boaters: $3 per-person conserve native fish species. Copies of the and most of Yellowstone Lake. Only non- per-night (group maximum $15 per night). complete park regulations are available wher- motorized boating is allowed on most other • Groups with stock animals: $5 per-person ever permits are sold, and online at www.nps. lakes. Only one river is open to non-motorized per-night. gov/yell/planyourvisit/fishing.htm boating, the Lewis River channel between Lewis and Shoshone lakes. Detailed information on backcountry permit Possession limits and closures vary throughout fees and making advanced reservations is the park. Anglers are responsible for knowing If you plan to boat in the park, please famil- available online at www.nps.gov/yell/plan- the regulations in the area they are fishing. iarize yourself with Yellowstone National Park yourvisit/backcountryhiking.htm Anglers are also responsible for knowing how Boating Regulations. Copies are available online to tell the difference between species.Native www.nps.gov/yell/planyourvisit/boating.htm fish must be released unharmed back into the and at backcountry offices. water immediately. These include: • Arctic grayling Boat permits & • cutthroat trout AIS inspection locations • mountain whitefish Motorized & non-motorized boat These tackle and gear restrictions apply: permits & AIS inspections: • Hooks must be barbless. South Entrance Backcountry Office, Grant • Tackle and lures must be non-toxic. Lead Village Backcountry Office, Bridge Bay Marina tackle is not allowed. Ranger Station • Bait is prohibited. Float tube only permits • Felt-soled footwear is not permitted. & AIS inspections: Locations above, and also at Mammoth I Backcounty Office, Canyon Backcountry Horses, mules, and Office, Old Faithful Backcountry Office, other stock animals Northeast Entrance, Bechler Ranger Station Traveling in the Yellowstone backcountry with horses, mules, or llamas is an exciting Watercraft users and anglers are way to see the park. By their very nature, these ] asked to inspect all items that may large animals have the potential to leave great come in contact with park waters, ensuring impacts on the land around them. Permits are that they are clean, drained, and dry. required for both day rides and overnight trips. To obtain permits and plan a safe, enjoyable, á Swimming low-impact trip, please contact a backcountry Park waters are swift and cold Aquatic Invasive Species are nonnative www.nps.gov/yell/ office or look online at • Swimming in hot springs or their runoff plants and animals that can cause irreversible planyourvisit/horseride.htm channels is prohibited. harm to the park ecosystem. New Zealand mudsnails, whirling disease, and lake trout Trails typically open for stock use July 1. Some • Swimming in park rivers is not have resulted in loss of native fish and closure trails may open earlier or later depending on recommended. Currents can be dangerously of some areas. Help us protect park waters. trail conditions. Proof of a negative Coggins strong and fast. • Swimming in Yellowstone Lake is not test is required. Hay is prohibited in the Transporting water, or any aquatic plants and recommended. Average lake temperature is backcountry and weed-free hay restrictions are animals into or between park waters is illegal. approximately 41º F (5º C). enforced in other areas. If you witness a violation, call 307-344-2132 or contact a ranger. 5 Hiking in bear country
• BE ALERT watch for bears, fresh tracks, Photography or scat. Have reasonable expectations of your • MAKE NOISE camera. A cell phone camera will not be able Ñ Day hiking in areas with limited visibility. to capture the same resolution and detail as a More than 1,000 miles of hiking trails wind more advanced camera with large lenses. through Yellowstone National Park. Whether • CARRY BEAR SPRAY and know how to use it. Arm yourself with patience. To get the best you hike for half a mile or more than ten, the shot, you will spend more time waiting and backcountry can be an escape from the crowds • HIKE IN GROUPS observing than photographing. Look for and a chance to get in touch with the wilder- of three or more people. patterns in animal behavior that can help you ness that Yellowstone preserves. get a great shot. You may have to wait a while— Ask at any visitor center for brochures • DO NOT RUN, so be ready. back away slowly. describing day hikes throughout the park. Stay safe behind and in front of the camera. Remember to ask about any seasonal closures, An unusual vantage point can add drama to trail conditions, or wildlife sightings when you your image, but you don’t want to add the plan your hike. Be prepared for wildlife drama of a hospital visit to your trip. Never encounters and carry bear spray on all hikes. sacrifice safety for a photograph.
• Be aware of your surroundings. Stay Most popular day hikes: behind fences and guard rails. Never turn your back on wild animals. 1. Mount Washburn, north of Canyon • Keep children close to you at all times. 2. Beaver Ponds, at Mammoth Hot Springs Never try to pose them with wildlife. 3. Lone Star Geyser, near Old Faithful • Stay out of the road. Do not stop your 4. Fairy Falls, north of Old Faithful vehicle in the road, or stand in the roadway. 5. Storm Point, east of Fishing Bridge Do not block any portion of the road with Bear spray rentals tripods, chairs, or other objects. Do not Bear Aware LLC rents block the free flow of traffic. bear spray from May 25– September 30. The rental * Bicycling kiosk is located at the Bicycling is permitted north end of the Canyon on paved roads, Visitor Education Center parking areas, and parking area. designated routes. Bicycles are subject to Rentals include holster and belt, hiking safety the same traffic rules information, and instructions on proper use of as automobiles and are bear spray. Cost is $9.25 per day or $28.00 per prohibited on trails week (3–7 days). Prices do not include tax. For and boardwalks. ' Be prepared for more information visit bearaware.com. Park roads are narrow Rental returns bear encounters and winding with few shoulders. Therefore, Return items to the Canyon kiosk, Madison regulations require cyclists to ride single file Hiking in bear habitat has inherent risks. You campground, park gas stations, or to the Cooke and we strongly recommend wearing a helmet are likely to be safer if you stay on roads and City Visitor Center. official trails but your safety cannot be guar- and high-visibility clothing. anteed. Federal regulations require you to stay Bear spray recycling Road elevations range from 5,300 to 8,860 feet at least 100 yards (91m) away from bears. (1,615 to 2,700 m), and services and facilities Bear spray cannot be taken on are far apart. During April, May, and June, high Learn more about bears, safe bear viewing, airplanes or thrown in the trash. snowbanks may make travel more dangerous. and how to properly use bear spray at Canisters can be recycled in the park Experiencing Wildlife in Yellowstone, a free at hotel front desks, general stores, Find information on the park website or pick ranger program presented from Memorial Day backcountry offices, and ranger up the Bicycling in Yellowstone brochure at a to Labor Day at visitor centers throughout the stations; also at some area camping visitor center or ranger station. park. See visitor centers for details. stores, and the Bozeman airport. 6 Let someone else do the driving Authorized guides and outfitters Many authorized guides and outfitters are ready to show you the wonders of Yellowstone, and each has a unique approach. Make sure that your guide, tour company, or other commercial Activities for young people Explore park heritage service is fully authorized by the park. Report unauthorized operators to a Junior Ranger Program Opportunities to connect to the past are park ranger, or contact Concessions If you are age 4 or older, you can become everywhere in Yellowstone. Visit Mammoth Management at 307-344-2271. a Yellowstone Junior Ranger. Stop by any Hot Springs to walk the self-guiding trail Authorized providers are listed on the visitor center to purchase a Junior Ranger around Fort Yellowstone, which chronicles park website at www.nps.gov/yell/ activity booklet for $3. To earn your official the U.S. Army’s role in protecting the park. planyourvisit/guidedtours.htm Yellowstone Junior Ranger patch, you need to: Other historic sites include the Fishing Bridge Museum, the Museum of the National Park • Hike on a park trail or boardwalk. Ranger, Obsidian Cliff, and the Old Faithful Inn • Complete the age-appropriate activities on and Historic District. geysers, wildlife, and park habitats. • Attend a ranger-led activity—such as a talk, Removing or possessing natural guided walk, or evening campfire program— or cultural resources (such as wild- and get the ranger’s signature. ù flowers, antlers, rocks, and arrowheads) is Yellowstone Forever Institute Children and adults benefit by learning more strictly prohibited. Programs about wildlife, plants, geology, about the natural wonders of the park and and history are perfect for curious adults sharing the fun of becoming a Junior Ranger. and families who want to spend a day or more exploring the park with a knowl- The Heritage and Research Center Young Scientist Program edgeable guide. To find out more, call (above) is located just beyond the North Become a Young Scientist! 406-848-2400 or visit Yellowstone.org Buy a self-guiding booklet Entrance in Gardiner, Montana. This facility for $5 at the Canyon Visitor is home to Yellowstone’s museum collec- Education Center (ages tion, archives, research library, archeology 10+) or Old Faithful Visitor lab, and herbarium. Although primarily a Any commercial activity in the park Education Center (ages 5+). research facility, tours provide an inside look requires a permit. In the Old Faithful area, check at some of the collections. Free tours are • Commercial filming, regardless of out a Young Scientist Toolkit available Wednesdays at 2 pm, May 29 through equipment, and photography with props for the gear you need for September 4, 2019 (limit 15). For reservations, or models, require permits. For more your investigation. Once you finish, you will be please call 307-344-2264. information call: 307-344-2722. awarded a Young Scientist patch or key chain.
Make the Most of Your Visit
Yellowstone encompasses more than 2.2 Only one day here? Two or more days? million acres, most of it beyond the reach of roads. One could take an entire lifetime to 8 See the most with one-day driving tours: • Explore one theme, such as geology, in depth. For example, visit Mammoth Hot experience the park—and you would still never • Drive to the Old Faithful area and walk Springs to see travertine formations and view see it all. Here are some suggestions for making around the geyser basin; drive to the Canyon the sedimentary layers of Mount Everts, the most of the time you do have. area—stop at several overlooks and walk drive through glaciated terrain to Tower along the rim. Tour early in the day to avoid crowds: Most Fall or the Lamar Valley, then climb Mount • Or, visit Old Faithful and one other people tour the park from 10:00 am to 6:00 pm. Washburn to view the Yellowstone Caldera hydrothermal area, such as Norris, West Wildlife are most active at sunrise and sunset; and evidence of glaciers. Thumb, Fountain Paint Pots, or Mammoth. arriving before 8 am improves your chances of • Plan an overnight trip into Yellowstone’s • Begin in Hayden or Lamar valleys to look for observing animals during their active periods. backcountry. Rangers at park backcountry some of the park’s large animals. For a break Park entrance gates are open 24-hours. offices can help you find a site, get a permit, from the road, consider one or two moderate share information about trail conditions, and Visit a hidden gem: day hikes. Take a day hike, or stroll help make sure that you are equipped and • Explore one area of the park in depth— one of our historic walking tours at Fort Yellow- informed for a safer experience. attend a ranger talk. From 15-minute stone or Old Faithful historic districts. You • Slow down and try your hand at capturing presentations to 2-hour tours, programs are could even explore nearby national park units, the beauty of Yellowstone through available throughout the park. national forests, state forests, and state parks. journaling, painting, or simply observing. The entire region offers an amazing variety of • Make plans to visit again soon! public lands for recreation and enjoyment. 7 Famously Hot Features
Yellowstone was established in 1872 as the Hot springs are the most common hydro- world’s first national park primarily because thermal features in the park. They vary from of its unparalleled collection of geysers, hot frothing mocha-like boiling water to clear and springs, mudpots, and steam vents. calm pools of tremendous depth.
Mudpots are acidic features with a limited water supply. Their consistency and activity vary with the seasons and precipitation.
Fumaroles, or steam vents, are the hottest hydrothermal features in the park. They are easier to see in cool weather.
Travertine terraces are found at Mammoth Hot Springs, where the interactions of water and limestone create chalk-white travertine.
Geysers erupt with steaming hot water. Variations in each geyser’s underground reservoir determine whether it is regular and The trail to Lone Star Geyser begins about 3.5 miles The bubbling mudpots of Fountain Paint Pots may be predictable—like Daisy Geyser in the Upper southeast of Old Faithful. thicker or more active as local precipitation changes. Geyser Basin—or irregular like Steamboat Geyser in Norris Geyser Basin. How do geysers work? Geysers are hot springs with narrow spaces in their plumbing, usually near the surface. These How “faithful” is Old Faithful Geyser? constrictions prevent water from circulating freely to the surface where heat would escape. Since its first documentation in 1870, Old Faithful has been one The deepest circulating water can be more of the more predictable geysers. Over time, the average interval than twice as hot as the surface boiling point of between Old Faithful’s eruptions has increased or decreased, due 199° F (93° C). to changes in its plumbing from ongoing processes and earth- quakes. The Hebgen Lake Earthquake (1959), caused an increase The surrounding pressure also increases with in the time between eruptions. The average interval between erup- depth, similar to the ocean. Increased pressure tions of Old Faithful Geyser, as of February 2019, is 98 minutes ± exerted by the enormous weight of the over- 10 minutes, with intervals ranging from 79 to 109 minutes. lying rock and water prevents the water from boiling as it heats up.
As the water rises, steam forms. Bubbling upward, steam expands as it nears the top of Where geology and biology thrive the water column until the bubbles are too Descendants of the first life forms to evolve Scientists continue to study the many mysteries large and numerous to pass freely through the on Earth live in the extremely hot, sometimes of thermophiles and their extreme habitats in constrictions. At a critical point, the confined acidic, habitats in and around hydrothermal the living laboratories of Yellowstone’s thermal bubbles actually lift the water above, causing features. The heat-loving microorganisms, areas and features. the geyser to splash or overflow. This decreases called thermophiles, survive and thrive in pressure on the system, and violent boiling Yellowstone’s active volcanic environment. results. Tremendous amounts of steam force water out of the vent, and the eruption begins. Nourished by energy and chemical building blocks available in the hot springs, the microbes build vividly colored communities Stay on boardwalks and that vary depending on the types of microbes, ñ designated trails. Do not touch the pH (acidity or alkalinity), temperature of any thermal features and keep foreign the feature, and exposure to sunlight. objects out of springs.
Millions of individual microbes can connect Water is expelled faster than it can enter the into long strands called filaments. Some fila- geyser’s plumbing system, and the heat and ments tangle, forming mats. Flowing water pressure gradually decrease. The eruption brings other microbes, organic matter, and stops when the water reservoir is exhausted or minerals that add to the mat. Mats can be thin when the system cools. as tissue paper or thick as lasagna. Due to their fragility, they must not be touched. Yellowstone’s geyser basins contain foun- tain-type geysers and cone-type geysers. Dozens of types of microbes from all three Fountain-type geysers shoot water out in domains of life can exist in these mats, from various directions from a pool of water. Cone- Archea in the hottest, most acidic features to type geysers, like Lone Star Geyser (photo the more widespread Bacteria and Eukarya. Microorganisms thrive in hot springs, and other above) erupt in a concentrated jet of water hydrothermal features. from inside a rock formation. 8 Wild Lands and Wildlife
Signs of spring renewal Spring in Yellowstone is a feast for your senses. Within the herd with other bulls. The winners earn the right to Young animals are being born all around the mate with receptive females. park, birds are returning or passing through in Yellowstone is the only place in the United their timeless migration, frogs call in the ponds. States where bison have lived continuously After a gestation period of 9 to 9 1⁄2 months, Listen and look for the sights special to this since prehistoric times. Yellowstone bison are calves are born in late April and May. Their time of year. special because they are America’s largest bison orange fur makes them easy to see, even from population on public land and have not been a distance, and has earned them the nickname Mountain bluebirds (above) return to hybridized through interbreeding with cattle. “red dogs.” Look for bison in open country Yellowstone National Park while winter still along the Lamar, Yellowstone, Firehole, and cloaks the landscape. These insect eaters feast Bison eat primarily grasses and sedges and Madison rivers. on the beetles and other scavengers consuming are well-suited to both prairies and forests. animals killed by the winter. As they flit to and With adult males weighing up to 2,000 pounds from perches, they look like pieces of the sky (907 kg), the bison is the largest land mammal Bison or buffalo? flying about. in North America. This iconic ungulate is the In North America, both “bison” and National Mammal of the United States. “buffalo” refer to the American bison Bighorn sheep give birth on the sheer cliffs (Bison bison). Generally, “buffalo” is used between Tower Junction and Tower Fall. They Yellowstone bison herds exhibit wild behavior, informally; “bison” is preferred for formal and their lambs blend in with the columnar like their ancient ancestors. The herd is or scientific purposes. Early European basalt, but be patient—sometimes just a hint of comprised of cows, calves, and some younger explorers called this animal by many movement is all you need to finally spot them. bulls. Mature bulls spend most of the year names. Historians believe that the term alone or with other bulls—except during the “buffalo” grew from the French word for rut, or mating season. During the rut in July beef, boeuf. American bison are a different and August, mature males display their domi- genus than other buffalo in the world. nance by bellowing, wallowing, and fighting
Bringing up bear cubs Both grizzly and black bear cubs are born in the deep winter months, while their mother hibernates. In April and May, they begin to venture out with their mother as she digs for roots, insects, and squirrels. Cubs stay with their mother for two to three years before Members of the Lamar Valley pack in 2012. striking out on their own. Pack mentality Look for black bears along the edges of Yellowstone National Park is the site of one wooded areas in the Lamar and Hayden of the most ambitious and controversial valleys, or among the trees near Mammoth and wildlife restoration projects in the world. The Tower. Grizzly bears are usually seen in open Yellowstone Wolf Project has yielded more than areas. (See page 6 for information about safely two decades of discoveries on wolf behavior, recreating in bear country.) predator–prey relationships, wildlife disease management, and ecological complexity.
Keep your distance The stark white backdrop of snow and the general absence of leaf cover make winter an 25 YARDS (23 METERS) 100 YARDS (91 METERS) ideal time for visitors and researchers alike to observe wildlife. From the popular overlooks of Lamar Valley, it is possible to get a glimpse of wolf society. You may even witness the Stay at least 100 yards (91m) away from bears and wolves, and at least 25 yards (23 m) away from dangerous dance of predators and prey as each all other wild animals. struggles to survive. 9 Old Faithful Village and Upper Geyser Basin
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