Description - Devil's Sinkhole State Natural Area, formerly part of the Whitworth Ranch, is a 1859.7 acre area located approximately six miles northeast of Rocksprings in Edwards County. It was acquired in 1985 and was opened to limited access in 1992. The Sinkhole property does not front a public roadway.
- The Sinkhole, discovered by Anglo settlers in 1867, is a registered National Natural Landmark. The main attraction is the Devil's Sinkhole itself. It is a vertical cavern with an opening measuring approximately 40 x 60 feet and a vertical drop to the main cavern of about 140 feet. The main cavern is circular and reaches a total depth of 350 - 400 feet.
Access to the park can be obtained only by contacting Kickapoo Cavern State Park to prearrange a tour. Access into the Sinkhole is prohibited. A per person fee is charged for participation in prearranged tours. Call Kickapoo Cavern for information on tour dates and fees.
Since the depth of the cave reaches below the water table, there are freshwater lakes around its
perimeter. These lakes support two unique organisms; one, an endemic amphipod, and the other, a rare aquatic isopod. Both these organisms are crustaceans. Also, the walls of the vertical shaft of the cave support a Mexican fern species found in few other locations in the United States.
Recreation - Recreational opportunities offered by the Devil's Sinkhole State Natural Area includes, viewing natural scenery and picnicking.
Climate - The Devil's Sinkhole State Natural Area is located at an elevation of 2450 feet. Temperatures within the park range from a January average minimum of 35 degrees, to a July average maximum of 95 degrees. The park has an average annual rainfall of 23.6 inches. Current weather conditions can vary from day to day. For more details, call the park or Park Information at 1-800-792-1112.
The Devil's Sinkhole State Natural Area is situated within the San Angelo area of Texas. To reach the park, travel on State Highway 55 to Rocksprings and go north 6 miles on US Highway 377. Call Kickapoo Cavern to find out about the meeting place for tours.