Much of the Mammoth Lakes area, on both sides of the Sierra Crest, is on Inyo National Forest land. A small but prominent exception is Devils Postpile National Monument, west of the Sierra Crest, which is administered by the National Park Service. The area's campgrounds generally close during September and October for the winter and reopen for the season (subject to snowpack) from April through June.
Contact Devils Postpile National Monument as described in Information in Advance. Campsites are $14 per night. There are restrictions on summer driving to Devils Postpile.
The Inyo National Forest Web site contains current detailed information about camping in the Mammoth Lakes area. For more information, contact the Mammoth Ranger Station as described in Information in Advance. For maps and books, see the Inyo National Forest Bookstore. For more information, contact a visitors center.
