As one of the oldest nonprofits in the region, the Eastern Sierra Interpretive Association (ESIA) was established in 1970 by visionary citizens interested in helping the U.S. Forest Service provide interpretive education relevant to the unique surrounding landscape, sharing with the public the importance of the Sierra public lands. ESIA became one of the first independent organizations in the United States to operate under a Participating Agreement with the U.S. Forest Service for educational purposes. Subsequently, ESIA received its nonprofit 501(c)3 status in 1971. Today, ESIA’s ongoing agency partnerships include the Inyo National Forest, Humboldt-Toiyabe National Forest, Tahoe National Forest, Death Valley National Park, Devils Postpile National Monument, Manzanar National Historic Site, and the Bureau of Land Management Bishop Field Office.

National Forest Service Partners:

• Eastern Sierra Interagency Visitor Center (Lone Pine) – Open daily from 8:30 am to 4:30 pm
• White Mountain Public Lands Information Center (Bishop) – Open Tuesday through Saturday, from 8:30 am to 4:30 pm. Closed for lunch 12:00 pm – 1:00 pm
• Schulman Grove Visitor Center (Bristlecone) – Open Wednesday through Sunday, from 10:00 am to 4:00 pm
• Mammoth Lakes Visitor Center (Mammoth Lakes) – Open daily from 8:00 am to 5:00 pm.
• Mono Basin Scenic Area Visitor Center (Lee Vining) – Open daily from 8:30 am to 5:00 pm, until October 9th. Then, operating hours will be Thursday through Sunday 8:30 am to 5:00 pm.
• Tahoe National Forest Ranger Station locations (Camptonville, Nevada City, Foresthill, Sierraville, and Truckee) – Open Monday through Friday 8:00 am to 4:30 pm
• Humboldt-Toiyabe Ranger Station (Austin, Bridgeport, Carson, Sparks, and Tonopah) – Open Monday through Friday from 8:30 am – 4:30 pm

National Park Service Partners

• Devils Postpile National Monument – Open daily from 9:00 am to 3:30 pm.
• Manzanar National Historic Site visitor center and bookstore – open daily from 9:00 am – 4:30 pm.