Once a part of Yosemite National Park, Devils Postpile National Monument is located in Madera County, California near Mammoth Mountain in the east central portion of the state. Established as a national monument in 1911, Devils Postpile is an 800-acre park that highlights thick, symmetrical geologic formations that resemble piles of wood. These formations were caused by lava flow that may have occurred as much as 100,000 years ago.
The "posts'' that line the park range from 2 to about 3.5 feet thick and measure as much as 60 feet long. The posts sit or stand close together, resembling a pile of wood. The posts are polygonal, many having either five or six sides. Scientists say the variety in formation has to do with the way the lava cooled.
Regardless of the scientific specifics, however, Devils Postpile National Monument has long been a favorite attraction of those visiting the area, though the monument is only open during the summer season from early June through late October, limiting visitation to about 150,000 guests per year.
Devils Postpile is located in a stunning region of California, offering not only an opportunity to view and photograph these unique geologic formations but to enjoy some outdoor activities as well. About 8 miles of hiking trails are available within the monument and are suitable for a variety of skill levels. Hikers may also explore the adjacent Ansel Adams Wilderness, which offers more and varied trails, including some suitable for experienced trekkers. Inside the monument, guests may hike the Postpile Trail, which takes about 30 minutes and puts visitors face to face with the postpile. Two other trails lead to picturesque waterfalls - Rainbow Falls and Minaret Falls. The road to Rainbow Falls is about 2.5 miles while the Minaret Trail is about a mile shorter. Both are easy hikes but can be hot in the summer.
Fishing is another popular activity at Devils Postpile National Monument. Guests may fish the San Joaquin River, which is a designated Wild Trout River. Fishing can be done close to the parking lot or guests may take trails to other parts of the river. Fishing is also available at nearby Sotcher and Starkweather Lakes. A valid California fishing license is essential.
Though the park is closed to automobiles in the winter time, cross country skiers and snowshoers are welcome to use the land for winter sports. The backcountry terrain, however, is extreme and those who visit in the winter should have survival training as no services are available inside the national monument during this season.
Wildlife viewers will also enjoy a trip around Devils Postpile National Monument. About 100 species of birds can be found here as well as many animals indigenous to the High Sierra regions of California.
A small, 21-site campground is located at the monument and spots are issued on a first come, first serve basis. Open during the summer only, this campground includes flush toilets, running water, but no hook-ups.
