cattle during the 1870s. McKittrick Canyon is thought to be named after him. Frijole Ranch was the first permanent ranch house; it was constructed in 1876 by the Rader brothers. Frijole Ranch House was the only major building in the region; it served as a community center and regional post office from 1916 to 1942. Today, the Frijole Ranch House has been restored and operates as a cultural museum. In 1908, Williams Ranch House was built, and it was named after one of its inhabitants, James Adolphus Williams. Judge J.C. Hunter from Van Horn consolidated most of the smaller ranches in the area into the Guadalupe Mountain Ranch. In 1921, Wallace Pratt, a geologist for Humble Oil and Refining Company, was impressed by the beauty of McKittrick Canyon and bought the land to build two homes in the canyon. Both constructions were used as summer homes by Pratt and his family until 1960. Wallace Pratt donated about of McKittrick Canyon which became part of Guadalupe Mountains National Park. In 1978, the United States Congress designated 46,850 acres (190 km2) of the Texan side of the range as a wilderness area, managed by the National Park Service. Geography The Guadalupe Mountains reach their highest point at Guadalupe Peak, the highest point in Texas, with an elevation of . The range lies southeast of the Sacramento Mountains and east of the Brokeoff Mountains. The mountain range extends north-northwest and northeast from Guadalupe Peak in Texas into New Mexico. The northeastern extension ends about 10 miles (16 km) southwest of Carlsbad, near White's City and Carlsbad Caverns National Park; the southwest tip ends with El Capitan about east of El Paso. The mountains rise more than above the arid floor of the Chihuahuan Desert. The Guadalupe Mountains are surrounded by the South Plains to the east and north, Delaware Mountains to the south, and Sacramento Mountains to the west. The northwestern extension, bounded by a dramatic escarpment known as "The Rim", extends much further into New Mexico, to near the Sacramento Mountains. The range is bounded on the north by Four Mile Canyon; on the east by the valley of the Pecos River; and on the west by Piñon Creek, Big Dog Canyon, Valley Canyon, Middle Dog Canyon, and West Dog Canyon. Much of the range is built from the ancient Capitán Reef that formed at the margins of a shallow sea during