Summit cables have been put up every summer since 1919 at Half Dome to allow climbers to reach the top of the 8,842-foot granite dome, the San Francisco Chronicle reported. Thousands of climbers scale the granite rock as part of the 16-mile round trip, the newspaper reported.
It is not clear what caused the fall, park officials said. The incident remains under investigation.
Half Dome was designated a wilderness area in 1964, the Chronicle reported.