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Geologic Wonders along a River of Life
High on the western slope of the Sierra Crest, nature reveals two of its wonders - the weirdly wonderful "postpile" and the lovely San Joaquin River with its dramatic Rainbow Falls.
The geologic formation that is "the Postpile" is the world's finest example of unusual columnar basalt. Its columns of lava, with their four to seven sides, display a honeycomb pattern of order and harmony.
Another jewel in the Monument is the San Joaquin River. Along the river corridor, the Monument flourishes with life. Meadows burst forth with flowers that nourish deer, birds, and butterflies. This portion of the San Joaquin is a designated Wild Trout River where both novice and expert can play the waters for four species of trout. Lining the river are a combination of old-growth red-fir forest and new growth rejuvenated by fire. On the lower reaches of the Monument's 2.5 miles of river course, rainbows frequently sparkle over their namesake -- the 101-foot drop of Rainbow Falls.
In addition to its geologic wonders and the beauty and diversity of the San Joaquin River, the monument is a portal to the great Sierra backcountry. Some 75% of the monument is part of the Ansel Adams Wilderness. It is traversed by the historic John Muir and Pacific Crest trails; you can follow a trail from here to Mexico or Canada!
At 800 acres, Devils Postpile National Monument may be considered small by some, yet its natural and recreational values abound.Desginations
July 6, 1911 - Devils Postpile National Monument proclaimed
August 10, 1933 - Transferred to National Park Service
- Ansel Adams Wilderness, 1984
- Wild Trout River, 1995
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