Eastern Sierra Interpretrve iation EASTERN SIERRA INTERPRETIVE ASSOCIATION Helping connect people to the public lands in the Eastern Sierra ESIA provides engaging interpretive programs and outstanding book stores up and down U.S. Highway 395. Official partner of: FOREST SERVI CE NATIONAL SERVICE ENT OF AGRCUL ESIAONLINE.ORG ESIA is located in the following Federal Agency Visitor Centers: Bishop, Bridgeport, Devils Postpile, Lee Vining, Lone Pine, Mammoth Lakes, and Manzanar.