Devils Postpile National Monument
national monument, California
Devils Postpile National Monument, scenic area in Madera county, east-central California, U.S. It is situated in Inyo National Forest on the Middle Fork San Joaquin River, about 12 miles (20 km) southeast of Yosemite National Park. The monument, which lies on the western slopes of the Sierra Nevada, was established in 1911; it has an area of 1.2 square miles (3 square km).
Pacific Crest National Scenic Trail
The monument’s most notable feature is the Devils Postpile formation, consisting of a wall, or cliff, of polygonal basaltic columns some 40 to 60 feet (12 to 18 metres) tall and 10 to 30 inches (25 to 75 cm) in diameter. It was created within the last 100,000 years by the cooling and cracking of hot lava. Also in the monument is the 101-foot- (31-metre-) high Rainbow Falls (accessible by hiking trail) on the Middle Fork San Joaquin River. The Pacific Crest National Scenic Trail, joined by the John Muir Trail, traverses the northern half of the monument.
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