Mount Morrison, Mountain summit in Mono County, California.

Mount Morrison is a summit in the Sherwin Range of the Sierra Nevada, rising south of Convict Lake near Mammoth Lakes. Its highly tilted and faulted metasedimentary rocks include the Ordovician Convict Lake Formation, the Devonian Mount Morrison Sandstone and the Squares Tunnel Formation. The north face is steep enough to earn the nickname "Eiger of the Sierra," while the east face consists of extremely loose rock.

Mount Morrison is named for Robert Morrison, a merchant from Benton killed near Convict Lake on September 23, 1871, during a posse's pursuit of escaped Nevada State Penitentiary convicts. Norman Clyde reached the summit on June 22, 1928; John Mendendhall also summited in 1928, though the month is undocumented.

The peak is named for Robert Morrison, a merchant from Benton killed on September 23, 1871, while riding in a posse chasing escaped Nevada State Penitentiary convicts near Convict Lake. Mono Jim Peak, beside it, honours the Paiute guide who died in the same gunfight.

The northeast face presents a challenging climb requiring technical skill and climbing experience for safe ascent. Weather can change rapidly at elevation, so climbers should plan accordingly and bring appropriate gear for variable conditions.

The mountain contains fulgurites, which are glass tubes formed when lightning strikes specific soil types. These natural geological formations are rare evidence of electrical storms captured within the rock itself.