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The Eastern Sierra Intepretive Association (ESIA) is a non-profit membership organization dedicated to educate and inspire people about Sierra Nevada public lands through high quality interpretive products, exhibits, and programs at Devils Postpile National Monument and other sites including Death Valley National Park, Manzanar National Historic Site, three U.S. National Forests; the Inyo National Forest, Humboldt-Toiyabe National Forest, and Tahoe National Forest, and the Bureau of Land Management (BLM) Bishop Field Office. ESIA is dedicated to forging strong emotional and intellectual bonds between the Sierra Nevada and visitors of this broad region.

There are several ways to help through the Eastern Sierra Interpretive Association

• Become a member of ESIA
• Make a donation.
• Make purchases at bookstores supported by ESIA. These can be found at the Devils Postpile Ranger Station and in various locations along the Eastern Sierra including the Mammoth Lakes Welcome Center and Mono Basin Scenic Area Visitor Center.