The mandatory shuttle service to Reds Meadow Valley and the Devils Postpile National Monument began in 1979. The shuttle was determined necessary to reduce the impact on the environment from vehicle traffic. The narrow road into the Reds Meadow area serves as the only access to the San Joaquin River Valley, the Devils Postpile National Monument, Rainbow Falls, and five trailheads leading into the John Muir and Ansel Adams Wilderness Areas, including the Pacific Crest Trail and John Muir Trail. The road also allows access to 186 campsites (six campgrounds), four nature trails, two day use lakes, Reds Meadow Pack Station and Lodge, and Agnew Meadows Pack Station.

The shuttle runs every 30 minutes, or more frequently during periods of high use. The first bus each morning leaves Mammoth Mountain Main Lodge Gondola Building at 7:15 am. The last bus of the day leaves the Gondola Building at 7:00 pm, Devils Postpile at 7:45 pm, and Agnew Meadows at 8:00 pm, arriving back at the Main Lodge Gondola Building and out of service by 8:30 pm. Plan your trip accordingly. Wilderness permits DO NOT entitle backpackers to drive their own vehicles to trailheads or into the valley. Shuttle buses are equipped to accommodate packs and bicycles. Dogs on leashes are welcome on buses and ride for free.

Visitor Information