Palo Duro Canyon State Park, is a canyon which is part of a system of canyons of the Caprock Escarpment in the Panhandle of Texas (USA). As the second largers canyon in the US, it is roughly 120 minles long and has an average width of 6.2 miles, but reaches a width of 20 miles in some places. Its depth is aroun 820 feet but in some locations it can drop to 997 feet. Palo Duro Canyon has been named "The Grand Canyon of Texas" both for its size and for the dramatic geological features, including the multicolored layers of rock and steep mesa walls similar to those in the Grand Canyon. The canyon was formed by the Prairie Dog Town Fork of the Red River which initially winds along the level surface of the Llano Estacado of West Texas, then suddenly and dramatically runs of the Caprock Escarpment. Water erosion of the millennia has shaped the canyon's geological formations. Notable canyon formations incluede caves and hoodoos. One of the best know and the major signature feature of the canyon is the Lighthous Peak. Amulti-use, six-mile round trip loop trail is dedicated to the formation. The middle portion of the trail can be hot with little shade, and hikers should take plenty of water. The painter Georgia O'Keeffe, who lived in nearby Amarillo and Canyon earlyin the 20th century, work of the Palo Duro: "It is a burning, seethng cauldron, filled wtih dramatic light and color."