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MEXICO Las Moras Seco Creek K Er LAVACA MEDINA US HWY 77 Springs Uvalde LEGEND Medina River

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MEXICO Las Moras Seco Creek K Er LAVACA MEDINA US HWY 77 Springs Uvalde LEGEND Medina River Cedar Creek Reservoir NAVARRO HENDERSON HILL BOSQUE BROWN ERATH 281 RUNNELS COLEMAN Y ANDERSON S HW COMANCHE U MIDLAND GLASSCOCK STERLING COKE Colorado River 3 7 7 HAMILTON LIMESTONE 2 Y 16 Y W FREESTONE US HW W THE HIDDEN HEART OF TEXAS H H S S U Y 87 U Waco Lake Waco McLENNAN San Angelo San Angelo Lake Concho River MILLS O.H. Ivie Reservoir UPTON Colorado River Horseshoe Park at San Felipe Springs. Popular swimming hole providing relief from hot Texas summers. REAGAN CONCHO U S HW Photo courtesy of Gregg Eckhardt. Y 183 Twin Buttes McCULLOCH CORYELL L IRION Reservoir 190 am US HWY LAMPASAS US HWY 87 pasas R FALLS US HWY 377 Belton U S HW TOM GREEN Lake B Y 67 Brady iver razos R iver LEON Temple ROBERTSON Lampasas Stillhouse BELL SAN SABA Hollow Lake Salado MILAM MADISON San Saba River Nava BURNET US HWY 183 US HWY 190 Salado sota River Lake TX HWY 71 TX HWY 29 MASON Buchanan N. San G Springs abriel Couple enjoying the historic mill at Barton Springs in 1902. R Mason Burnet iver Photo courtesy of Center for American History, University of Texas. SCHLEICHER MENARD Y 29 TX HW WILLIAMSON BRAZOS US HWY 83 377 Llano S. S an PECOS Gabriel R US HWY iver Georgetown US HWY 163 Llano River Longhorn Cavern Y 79 Sonora LLANO Inner Space Caverns US HW Eckert James River Bat Cave US HWY 95 Lake Lyndon Lake Caverns B. Johnson Junction Travis CROCKETT of Sonora BURLESON 281 GILLESPIE BLANCO Y KIMBLE W TRAVIS SUTTON H GRIMES TERRELL S U US HWY 290 US HWY 16 US HWY P Austin edernales R Fredericksburg Barton Springs 21 LEE Somerville Lake AUSTIN Pecos River iver Johnson Dripping Springs City South Llano River US HWY 290 RR 12 Blanco River HAYS Bastrop US HWY 55 US HWY 41 KERR Cyp Blanco r ess C VALVERDE Kerrville KENDALL re Wimberley Rocksprings ek Devils River US HWY 377 Jacob’s Well BASTROP US HWY 90 95 Brazos Ri US HWY 277 Cave Without A Name Canyon Lake Y US HWY 83 Wonder Cave WASHINGTON WALLER San Marcos Springs US HW Colora ver REAL Guadalupe River San Marcos Rio Grande River H EDWARDS WY 46 do Ri BANDERA Medina Sa n CALDWELL FAYETTE ver Texas Blind Salamander (Eurycea rathbuni). Endangered species that lives only M Cascade Caverns Hueco Springs arco in the Southern Edwards Aquifer. Photo courtesy of Edwards Aquifer Authority. Boerne s R Seminole Canyon Cibolo Creek ive Sabinal River Comal Springs r State Park Bandera Natural Bridge Caverns Luling Camp Wood Medina New Frio River Braunfels Hondo Creek Lake Bracken Bat Cave COLORADOFountain Darters (Etheostoma fonticola). Endangered species that lives only in San Marcos Springs Goodenough UVALDE and Comal Springs. Photo courtesy of Dr. Glenn Longley. Seguin Springs Concan LOOP 1604 San Antonio Springs GUADALUPE Guadalupe River San Felipe KINNEY Frio Bat Cave San Pedro Springs San FORT BEND Amistad Reservoir San San Antonio Springs P A GONZALES n US HWY 90 e US HWY 90 dro C to Del Rio US HWY 55 n Sabinal io BEXAR Brackettville ree Riv Hondo Castroville Medina River MEXICO Las Moras Seco Creek k er LAVACA MEDINA US HWY 77 Springs Uvalde LEGEND Medina River N ueces R Leona Springs Artesian Zone of the Edwards Aquifer 80 Y ive r DEWITT Recharge Zone of the Northern Edwards Aquifer WILSON US HW MAVERICK US HWY 173 Contributing Zone of the Northern Edwards Aquifer WY 72 VICTORIA US HW US H Guadalupe River R io G Y 16 Recharge Zone of the Barton Springs Edwards Aquifer 83 Y MATAGORDA rande R W Y KARNES 37 JACKSON S H S HW S U U FRIO Contributing Zone of the Barton Springs Edwards Aquifer iver GOLIAD San ZAVALA ATASCOSA A Eagle Pass nton io R Recharge Zone of the Southern Edwards Aquifer iver US H WY 277 Y 85 U S Choke Canyon H Contributing Zone of the Southern Edwards Aquifer US HW Frio River Reservoir W Y 7 Caves 7 Carrizo Springs BEE Springs US HWY 59 CALHOUN DIMMIT LaSALLE McMULLEN REFUGIO The endangered Black-Capped Vireo (Vireo atricapillus) is a small, migratory LIVE Freshwater flows from the Edwards Aquifer sustain many of our most Scale: 1 inch equals approx. 15 miles songbird that nests in Hill Country scrub every spring and summer. Photo © John Ingram. OAK important estuary species, including the endangered Whooping Crane. Photo © John Ingram. 115304560 Postcard showing horse-drawn wagons crossing the San Antonio River, which no longer flows naturally. Water is now pumped out of the Edwards Aquifer to recreate stream flow. Photo courtesy of University of Houston library. XPLORE, ENJOY, PROTECT! GUIDE TO APPRECIATION AND CONSERVATION OF THE Texas Show Caves This eco-tour guide to the Texas has some unusually beautiful and interesting show caves to offer. Several other caves are now open to guided heart of Texas – the Greater “Wild Caving Tours.” Edwards Aquifer Ecosystem – provides an introduction to GREATER EDWARDS AQUIFER ECOSYSTEM Cascade Caverns. Located between San Antonio and Boerne, Cascade Caverns’ tour follows the main 244-m-long the Texas Hill Country. We passage, which steadily enlarges until ending in a large room highlighted by the historic cave’s namesake – an impressive invite you to explore the region and its many clear running waterfall. www.cascadecaverns.com. streams, scenic vistas, cold springs, show caves and bat caves, big cities and small ranching communities, and Cave Without A Name. Located northeast of Boerne, forested limestone Hill Country to the north and west and the parks and preserves. Along the way we hope you will gain BOSQUE Cave Without A Name has a short trail but is a gently rolling Blackland Prairie and Texas Coastal Plain to the east CONCHO a better understanding of and appreciation for our natural wonderful cave. A staircase spirals down a pit and UPPER COLORADO © Austin History Center and south. and cultural heritage. LEON opens into a 7-m-high by 12-m-wide passage decorated Baptismal service at Barton Springs, 1925 COWHOUSE with large speleothems. The trail ends after 186 m at Over time, the forces of erosion carved what we recognize as the This guide is also a call to action. The heart of Texas is Comal Springs – Emerging in New Braunfels’ historic Landa BRADY LAMPASAS a large stream passage. www.cavewithoutaname.com. flat-top, stair-stepped Hill Country out of the uplifted limestone of under assault from urban sprawl. Unless concerned citizens Park, Comal Springs are the largest in Texas and the south- the Edwards Plateau. Millions of years of slightly acidic rain perco- COLORADO Caverns of Sonora. Near Sonora off IH-10, Caverns take action, the Hill Country will very soon be lost to land west United States. Landa Park’s spring-fed pool and the SAN SABA lated down through the faulted and fractured limestone, dissolving of Sonora is internationally recognized as one of the fragmentation and road building, its streams and springs Schlitterbahn water park a short distance downstream on the rock and creating spaces that hold and convey water. These LITTLE most beautiful caves in the world. Its basic layout is a polluted and pumped dry. We invite you to join the Greater the Comal River are enjoyed by hundreds of thousands of spaces range from tiny “honeycomb” pores to large caverns. Many complex 3-dimensional maze formed along a few parallel Edwards Aquifer Alliance and the thousands of concerned Texans every year. or near-parallel fractures. Most of the passages are lined of the largest of these caves are now open for touring and are listed Bat Conservation International © Merlin D. Tuttle, Texans who are jumping in to save the heart of Texas. San Antonio Springs – Historically the state’s 6th largest, in the box at right. © Edwards Aquifer Authority SAN GABRIEL with sparkling speleothems. www.cavernsofsonora.com. Mexican Freetail bats beginning their night flight from Bracken Bat Cave Andy Grubbs swimming in the Valdina Farms Sinkhole Photo by Allan Cobb LLANO (NORTH) LLANO San Antonio Springs emerge on the campus of Incarnate Inner Space Cavern. In Georgetown off IH-35, Inner Space Cavern is a large, complex cave with many Word College in downtown San Antonio and flow through The Edwards is known as a karst aquifer, characterized by rapid, A significant portion of the Edwards Aquifer – known as the beautiful formations and interesting displays of Pleistocene-age mammal bones. Visitors enter the Brackenridge Park. Spanish missionaries located here in 1718; open-channel water flow and by a thin to nonexistent soil cover. artesian zone and shown in green – rests below the surface, covered COLORADO/ PEDERNALES cave on a cable car ride and the trail is smooth and sloping, about 550 m (1,800 ft.) long. www.innerspace.com. GETTING ORIENTED: The Great the City of San Antonio followed. Today, San Antonio is Because of these physical factors, the Texas Commission on by younger geologic formations. These overlying formations protect BARTON/ ONION Springs of the Edwards Aquifer the largest city in North America wholly dependent on Environmental Quality has recognized since 1989 that the the underlying aquifer from pollution at the surface. From the large LLANO (SOUTH) LOWER Longhorn Cavern. Between Burnet and Marble Falls off Hwy 281, Longhorn Cavern has few formations but lovely The Edwards Aquifer is a mysterious maze of underground groundwater, and thus the future of the city depends on Edwards Aquifer is more vulnerable to pollution than any other map you can see that most of San Antonio is built over the artesian COLORADO wall sculpting and large calcite crystals.
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