Las Trampas WALNUT CREEK R Br 24 E Ion Castle Black G E Io S-T Rock Diamond- LAFAYETTE Na O-M No L T T Rt To-Mt

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Welcome to Las Trampas WALNUT CREEK R Br 24 e ion Castle Black g e io s-T Rock Diamond- LAFAYETTE na o-M No l T t rt To-Mt. Diablo rai . h l Di G Regional Trail a at b e R Year opened: 1966 Acres: 5,593 Diablo lo oa Mt. d Las Trampas

d Foothills

a Diablo Highlights: hiking, biking, horseback riding, reserv- o Regional R

s ’ Lafayette- Park State y r able group camping area, birdwatching, wildflowers a Moraga Park M ALAMO Regional Wilderness . t Regional Trail S Stone Vall in season, The Ranch at Little Hills (swimming, ey R Green Valley oad picnicking), Las Trampas Stables (horse riding and Regional Trail Lafayette, Walnut Creek, Alamo, boarding). El Cerro Blackhawk Las Trampas- Bl. Diablo Road Fun Facts: • Eugene O’Neill wrote several plays To-Mt. Diablo Danville, San Ramon Ca Road Regional Trail mino Tas while living in the Tao House. O’Neill inspired the saj DANVILLE ara Las Sycamore name Corduroy Hills, saying the long, dry grass on San Ramon Vly Bl Trampas Sycamore Valley the hills was like corduroy. Regional Bollinger ValleyHolbrook Road Regional Wilderness Dr. Open Space Preserve Ca ny D o o n u g h e r ty

Las Trampas Regional Wilderness, one of the East Bay R o Road SAN a Cull Canyon Road Road RAMON d Regional Park District’s largest parklands, is a 5,342- Redwood Rd. Iron Horse Regional Trail Canyon d oa acre wilderness preserve that lies on the western Canyon R MorganD rive a Crow e edge of the San Ramon Valley. Its dramatic landscape, rR Norris Bishop Ranch A i d Anthony y Regional a g 680 B e commanding views, and relatively undisturbed natural Chabot Open Space T

a Preserve i environment are key attractions that make this park- Lake l Cull Canyon Dublin Hills Chabot Regional Regional Park L North land special. ak e C Rec. Area ha Road bo Trail-oriented recreational activities are the dom- t CASTRO 0 2.5 Mi. VALLEY DUBLIN inant attractions of the wilderness. The 40-mile trail network provides access to Las Trampas Ridge and Rocky Ridge – the preserve’s two main ridges – pro- 18012 Bollinger Canyon Road viding an unmatched recreational experience for hik- San Ramon, CA 94583 ers, mountain bikers, and horseback riders. More than half the trails are single-track routes that challenge TO REACH LAS TRAMPAS THE RANCH AT LITTLE HILLS is a 100-acre the ardent trail user while enhancing the solitude of a picnic park located adjacent to Las Trampas Regional From I-580 in Castro Valley, take Crow Canyon wilderness setting. Wilderness on Bollinger Canyon Road. The facility is Road north to Bollinger Canyon Road. Turn left and The park is bisected by Bollinger Creek. To the available for group picnics by reservation only. Call follow Bollinger Canyon Road into the park. From west is Rocky Ridge, accessible from the main parking (925) 837-8158 for information, or see bookyourpic- I-680 in San Ramon, take Crow Canyon Road west lot via a paved road that brings hikers near the 2,024- nic.com. to Bollinger Canyon Road. Turn right and follow foot summit. At the 1,760-foot elevation you can hike westward along a trail managed by the East Bay Mu- LAS TRAMPAS STABLES offers western horse- Bollinger Canyon Road into the park. To reach the nicipal Utility District to the Valle Vista Staging Area back riding lessons for adults and children older than Ringtail Cat trailhead (limited parking; no horsetrail- on Canyon Road in Moraga, or south to the Chabot age 8. With access to miles of horseback riding trails ers allowed) exit I-680 at Stone Valley Road in Alamo staging area in Castro Valley. A permit is required to in Las Trampas and the adjoining EBMUD watershed and go west. Turn left (south) on Danville Boulevard transit EBMUD lands: see www.ebmud.com. (permit required), it is ideally situated for those who and go for about 0.71 miles to Hemme Avenue. The Las Trampas Ridge is accessible via the Chamise wish to explore the park on horseback. For more staging area is about one-half mile ahead, at the end and Bollinger Creek Loop trails. The view from the information, call 925-855-1570. of the road. ridge affords vistas of the surrounding valleys, Mt. Di- PRE-PARKLAND HISTORY The Tatcan, one of ablo, and other points of interest. The Corduroy Hills six Bay Miwok-speaking tribes, inhabited the hill lands Trail, skirting Eagle Peak, is for hiking only, as are the and valleys in the place now known as the central East Sycamore, Mahogany, and Trapline trails. Bay Hills along the San Ramon Creek drainage. They managed the land using specialized horticultural tech- POLICE, FIRE, MEDICAL EMERGENCY...... 9-1-1 niques that enhanced the numbers and health of the EBRPD HEADQUARTERS...... 1-888-327-2757 plants and animals on which they relied, including deer, CAMPING RESERVATIONS...... 1-888-327-2757, option 2 elk, and antelope, and likely trout and steelhead. Bay East Bay Regional Park District PARK OFFICE...... 1-888-327-2757, option 3, ext. 4537 Miwoks continue to live in the Bay Area and are active 2950 Peralta Oaks Court, TRS RELAY FOR HEARING IMPAIRED...... 711 Oakland, CA 94605-0381 in the protection of local ancestral cultural sites. 1-888-327-2757 (1-888-EBPARKS)

www.ebparks.org Rev. 8/18

until 1944. While there, O’Neill wrote some of his his of some wrote O’Neill there, While 1944. until Spend an entire day hiking the Rocky Ridge and the Devil’s Hole area. Hole Devil’s the and Ridge Rocky the hiking day entire an Spend

and California ground squirrels in the grasslands of Las Trampas. Las of grasslands the in squirrels ground California and

ebparks.org/rules.

The Tao House served as the O’Neill family residence residence family O’Neill the as served House Tao The

jackrabbits black-tailed like mammals small for hunt eagles Golden

e www. e Se 38). (Ordinance rules park with plying

2012. in Trampas Las into released eagle golden rehabilitated A

Ridge at the eastern boundary of today’s preserve. preserve. today’s of boundary eastern the at Ridge

- com and knowing for responsible are Visitors

home on the lower eastern slopes of Las Trampas Trampas Las of slopes eastern lower the on home

under voice control at all times. all at control voice under

and his wife Carlotta Monterey built Tao House, a a House, Tao built Monterey Carlotta wife his and

and play fields, and on some trails. They must be be must They trails. some on and fields, play and

for Literature, the noted playwright Eugene O’Neill O’Neill Eugene playwright noted the Literature, for

lots, picnic areas, developed areas such as lawns lawns as such areas developed areas, picnic lots,

In 1937, one year after receiving the Nobel Prize Prize Nobel the receiving after year one 1937, In

park entrance. Dogs must be leashed in parking parking in leashed be must Dogs entrance. park

today’s popular The Ranch at Little Hills. Little at Ranch The popular today’s

Dogs must be leashed 200 feet from any trail or or trail any from feet 200 leashed be must Dogs

and patio. This facility was gradually expanded and is is and expanded gradually was facility This patio. and

RULES

facility that originally consisted of a pool, snack stand, stand, snack pool, a of consisted originally that facility

Horses have the right-of-way on trails. trails. on right-of-way the have Horses • oversaw construction of Little Hills Ranch, a picnicking picnicking a Ranch, Hills Little of construction oversaw

Bicycles are permitted on designated trails only. trails designated on permitted are Bicycles • main parking lot is now located. In 1955 the Muellers Muellers the 1955 In located. now is lot parking main

illegal. Mueller built his house in the 1930s where the park’s park’s the where 1930s the in house his built Mueller

and dangerous is wildlife approaching or Feeding exotic trees, some of which still grow on the site. Kurt Kurt site. the on grow still which of some trees, exotic

time. any at trails the on present be may Wildlife • existing house and planted a flower garden and many many and garden flower a planted and house existing

Proceed carefully at your own risk. risk. own your at carefully Proceed Canyon in the 1930s. Richard Mueller expanded an an expanded Mueller Richard 1930s. the in Canyon

steep. and rocky slippery, be can Trails • features. Richard and Kurt Mueller moved to Bollinger Bollinger to moved Mueller Kurt and Richard features.

weather. the in changes sudden for prepared Be • Canyon area, lending the name to geographic and park park and geographic to name the lending area, Canyon

is a leading cause of injuries on the trail. trail. the on injuries of cause leading a is In 1855 Joshua Bollinger settled in today’s Bollinger Bollinger today’s in settled Bollinger Joshua 1855 In

Dehydration water. of plenty drink and Carry •

the northern extent of Las Trampas. Las of extent northern the

the fire hazard during the dry season. dry the during hazard fire the feet above sea level – represent the floors of ancient ancient of floors the represent – level sea above feet

may be dangerous and may harm the water shed. water the harm may and dangerous be may

today’s Tice Valley and much of Alamo, and included included and Alamo, of much and Valley Tice today’s

ing. Cattle keep the grass height down, which reduces reduces which down, height grass the keep Cattle ing. feet above sea level, and Las Trampas Ridge about 1,600 1,600 about Ridge Trampas Las and level, sea above feet

areas undesignated in swimming and/or Wading •

Romero applied for a 20,000-acre grant that covered covered that grant 20,000-acre a for applied Romero

- graz cattle for areas some leases District Park The Two ridges – Rocky Ridge averaging about 2,000 2,000 about averaging Ridge Rocky – ridges Two

dangerous and causes erosion. erosion. causes and dangerous

parkland. In 1843, the brothers Jose and Inocencio Inocencio and Jose brothers the 1843, In parkland.

lift and exposure of well-defined geological formations. formations. geological well-defined of exposure and lift occasionally sighted. sighted. occasionally

be can shortcuts Taking trails. on Stay •

ville and Alamo, including the eastern side of today’s today’s of side eastern the including Alamo, and ville

- up the for account – faults Bollinger and Trampas Las are many species of hawks, and golden eagles are are eagles golden and hawks, of species many are

SAFETY and ETIQUETTE and SAFETY

- Dan through north Ramon San northern in Road aquifers and springs. Two major Bay Area faults – the the – faults Area Bay major Two springs. and aquifers The park is a good place for birdwatching. There There birdwatching. for place good a is park The

plying with park rules and regulations. and rules park with plying the San Ramon Creek watershed from Crow Canyon Canyon Crow from watershed Creek Ramon San the and paleontologic resources as well as its underground underground its as well as resources paleontologic and rattlesnake, do not approach or harass it. it. harass or approach not do rattlesnake,

- com by parklands your preserve and protect us Castro and Bartolome Pacheco in 1833. It comprised comprised It 1833. in Pacheco Bartolome and Castro GEOLOGY Las Trampas is known for its geologic geologic its for known is Trampas Las wary of rattlesnakes in the warmer months. If you see a a see you If months. warmer the in rattlesnakes of wary

Please enjoy your Regional Parks safely, and help help and safely, Parks Regional your enjoy Please 8,000-acre Rancho San Ramon given to Mariano Mariano to given Ramon San Rancho 8,000-acre

California, encompasses a large part of the parkland. Be Be parkland. the of part large a encompasses California,

properties for the wilderness area in 1966. in area wilderness the for properties

WELCOME! WELCOME! The first Mexican land grant in the area was the the was area the in grant land Mexican first The

whipsnake, a species listed as threatened by the State of of State the by threatened as listed species a whipsnake, camping. The Park District began acquisition of private private of acquisition began District Park The camping.

and squirrels. Chaparral habitat suitable for the Alameda Alameda the for suitable habitat Chaparral squirrels. and

to include hiking, riding, and primitive primitive and riding, hiking, include to

Map courtesy Museum of the San Ramon Valley. Ramon San the of Museum courtesy Map

raccoons, foxes, coyotes, opossums, bobcats, skunks, skunks, bobcats, opossums, coyotes, foxes, raccoons,

park was envisioned by the Park District District Park the by envisioned was park - ex an from teeth are park the of vicinity the in found

map. the of center the in is Wilderness Regional Trampas Las Today’s Canyon.

ness provides habitat for much wildlife, including deer, deer, including wildlife, much for habitat provides ness

yon” as a future park, and a 2,000-acre 2,000-acre a and park, future a as yon” boundaries of the park. The most common remains remains common most The park. the of boundaries Bollinger in is right), the to is (north end south or left, the to creek The center. bottom,

ANIMALS - wilder isolated and extensive park’s The – the area granted to Mariano Castro and Bartomole Pacheco in 1834. Mount Diablo is is Diablo Mount 1834. in Pacheco Bartomole and Castro Mariano to granted area the – - Can “Bollinger designated Supervisors Gomphotherium, found just northwest of the present present the of northwest just found Gomphotherium,

diseño (sketch-map) describes the proposed boundaries of the Rancho San Ramon Ramon San Rancho the of boundaries proposed the describes (sketch-map) This velopment. The Contra Costa Board of of Board Costa Contra The velopment. dozen fern species are found in the park. the in found are species fern dozen complete lower jaws of an ancient elephant known as as known elephant ancient an of jaws lower complete

- de parkland for jurisdictions local and ridgetop habitat at the end of Chamise Trail. Half a a Half Trail. Chamise of end the at habitat ridgetop years old. One of the more interesting finds were two two were finds interesting more the of One old. years

bond that provided funding to counties counties to funding provided that bond scrub oak. The latter, with its mistletoe, prefers the the prefers mistletoe, its with latter, The oak. scrub represent a fauna that is thought to be about ten million million ten about be to thought is that fauna a represent

PALEONTOLOGY beginnings in the 1964 passage of a state state a of passage 1964 the in beginnings eye, big leaf maple, canyon live oak, black oak, and and oak, black oak, live canyon maple, leaf big eye, Fossil deposits at Las Trampas Trampas Las at deposits Fossil

Las Trampas Regional Wilderness had its its had Wilderness Regional Trampas Las buck- laurel, bay oak, live coast include species Tree south boundary of the park and west of Rocky Ridge. Rocky of west and park the of boundary south

GROWING A PARKLAND PARKLAND A GROWING

oils come in contact with skin, clothing, shoes, or pets. or shoes, clothing, skin, with contact in come oils be about 135 million years old. These occur outside the the outside occur These old. years million 135 about be

threes and that can cause a long-lasting, itchy rash if the the if rash itchy long-lasting, a cause can that and threes has been closed since 1959. since closed been has marine sandstone, conglomerate and shale thought to to thought shale and conglomerate sandstone, marine

oak-like glossy green or reddish leaves that occurs in in occurs that leaves reddish or green glossy oak-like cess to a radar facility. The NIKE facility facility NIKE The facility. radar a to cess million years old. The oldest rocks in the area consist of of consist area the in rocks oldest The old. years million

beware of poison oak, a shrubby or bushy plant with with plant bushy or shrubby a oak, poison of beware - ac provide to – Trail View Ridge Rocky holland Formation sediments thought to be under six six under be to thought sediments Formation holland

are some creek dogwood along Bollinger Creek. Please Please Creek. Bollinger along dogwood creek some are built a road up to Rocky Ridge – today’s today’s – Ridge Rocky to up road a built - Mul are park the in rocks youngest the of Some

berry, deer weed, and dozens of other species. There There species. other of dozens and weed, deer berry, NIKE Missile Battery 25. The Army also also Army The 25. Battery Missile NIKE tion is seen as flat-faced tilted beds or bulging walls. bulging or beds tilted flat-faced as seen is tion

ry, chaparral, monkeyflower, coyote bush, hollyleaf red red hollyleaf bush, coyote monkeyflower, chaparral, ry, paved by the U.S. Army to construct construct to Army U.S. the by paved - forma the Ridge Trampas Las of side western the On

- gooseber elderberry, manzanita, toyon, with terspersed In 1957, Bollinger Canyon Road was was Road Canyon Bollinger 1957, In where millions of years of sediment had accumulated. accumulated. had sediment of years of millions where

- in brush, buck and chamise, sage, black is ridges Rocky Park Service. Park the ancient floor of shallow, irregular bays and straits straits and bays irregular shallow, of floor ancient the

the western and southern exposures of Las Trampas and and Trampas Las of exposures southern and western the a National Historic Site by the National National the by Site Historic National a Briones Formation sandstones and are believed to be be to believed are and sandstones Formation Briones

VEGETATION The dominant woodland vegetation on on vegetation woodland dominant The served by the District and is operated as as operated is and District the by served the western slope of Rocky Ridge. They consist of the the of consist They Ridge. Rocky of slope western the

- pre was house The Cometh.” Iceman found, along with a variety of fossilized marine clams. marine fossilized of variety a with along found, cient sea-floor rocks are the huge cliff-hogbacks along along cliff-hogbacks huge the are rocks sea-floor cient

Day’s Journey into Night” and “The “The and Night” into Journey Day’s squirrels, toads, and the honey badger have also been been also have badger honey the and toads, squirrels, - an the of interesting most the Among Ranges. Coast

most acclaimed works, including “Long “Long including works, acclaimed most tinct three-toed horse. Remains of ancient camels, small small camels, ancient of Remains horse. three-toed tinct seas that once covered most of the present area of the the of area present the of most covered once that seas Welcome to Las Trampas WALNUT CREEK R Br 24 e ion Castle Black g e io s-T Rock Diamond- LAFAYETTE na o-M No l T t rt To-Mt. Diablo rai . h l Di G Regional Trail a at b e R Year opened: 1966 Acres: 5,593 Diablo lo oa Mt. d Las Trampas