Devils Postpile National Monument
Overview
Please Note: The mandatory shuttle runs through September 5, 2022. After that time, visitors can enter in their own vehicle. Starting on October 1, 2022, please be prepared for up to 30 minute delays due to tree work along the road. The road will close for the season on October 11, 2022.
This unique geological structure features thousands of hexagonal basalt columns formed 100,000 years ago when lava flow slowed and then cooled and cracked. The area is accessible in summer months, and a mandatory shuttle offers visitors transportation to Devils Postpile and other Reds Meadow areas. Catch the shuttle from the Mammoth Adventure Center at Mammoth Mountain Main Lodge.
Visiting Devils Postpile requires a one-mile roundtrip hike. The trail is not fully accessible to wheelchairs at this time.