The stone amphitheater, named for the owner of the railroad company which constructed the Mount Tamalpais Scenic Railway,[1] is at an elevation of 2,000 feet and has 4,000 seats.

The theater group venue was listed on the National Register of Historic Places on February 2, 2015, for architecture and cultural history.

The venue was named for Sidney B. Cushing, the owner of the railroad company which constructed the Mount Tamalpais Scenic Railway.

[1] One of the oldest non-profit theater companies in the area, the Mountain Play staged its first theatrical performances in the natural amphitheater on top of Mt.

[8] Members of the audience hiked the eight miles from Mill Valley, or steamed up the mountain on the Mount Tamalpais and Muir Woods Railway, once billed as the "Crookedest Railroad in the World.

In the 1930s the Civilian Conservation Corps (CCC) worked to install the massive serpentine stones that now form the 4000-seat Sidney B. Cushing Memorial Amphitheater.

In 1993, the Mountain Play expanded its 10-year-old programs for the visually impaired to include professional describers who provide simultaneous audio description.