Sierra Madera crater is a meteorite crater (astrobleme) in southwestern Pecos County, Texas, United States. The central peak of the rebound structure of the impact crater rises above the surrounding land. The peak is visible from U.S. Highway 385 between Fort Stockton, Texas and Marathon, Texas. The Sierra Madera crater is located on private property on the La Escalera Ranch. It is in diameter and the age is estimated to be less than 100 million years (Cretaceous or younger). Apollo 17's Gene Cernan and Jack Schmitt did some of their geologic training here. See also Odessa Meteor Crater Marquez crater Barringer Meteor Crater, Arizona Trans-Pecos Pecos River Llano Estacado References External links Geology of the Sierra Madera cryptoexplosion structure, Pecos County, Texas, Professional Paper 599- H, By: H.G. Wilshire, T.W. Offield, K.A. Howard, and David Cummings. 1972. Impact craters of the United States Cretaceous impact craters Landforms of Pecos County, Texas