Petrified Forest National Park is located in Arizona near Navajo. It features one of the world's largest and most colorful concentrations of petrified wood. The park consists of two large areas connected by a north–south corridor. The northern area encompasses part of the multihued badlands of the Upper Triassic Chinle Formation called the Painted Desert. The southern area includes colorful terrain and several concentrations of petrified wood. Several American Indian petroglyph sites are also found in the southern area. Near the south end of the park is Agate House, a Native American building of petrified wood, reconstructed during the 1930s.
The Petrified Forest area was designated a National Monument on December 8, 1906. The Painted Desert was added later. On December 9, 1962, the whole monument was made a national park. It covers 218,533 acres (341.5 sq mi; 885 km²). Hiking opportunities are varied: the longest established trail in the park extends for only two miles; the others are one mile (1.6 km) or less.