Rock Formation · California

Devils Postpile

A cliff of perfect basalt columns

TypeRock Formation
StateCalifornia
Best seasonSummer & early fall (snow-closed otherwise)
How to visitNational monument; mandatory shuttle from Mammoth in summer + fee

A 60-foot wall of hexagonal basalt columns — cooled lava cracked into a near-geometric honeycomb — tucked in the high Sierra near Mammoth. Climb to the top to see the column tops polished by glaciers into a tile floor.

The shot

The columns from below, then the glacier-polished tops.

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