Mount Mary Austin, Mountain summit in Inyo County, California, United States.

Mount Mary Austin is a summit in the Sierra Nevada range that rises to approximately 13,000 feet and features rocky slopes mixed with alpine meadows. The terrain transitions between steep rock faces and open mountain grasslands where vegetation grows sparsely.

Mount Mary Austin is named for Mary Hunter Austin, author of The Land of Little Rain, who lived in Independence below the peak. The mountain lies east of the Sierra Crest in the John Muir Wilderness, where entry permits have been required because the area is habitat for the endangered Sierra Nevada bighorn sheep.

The peak honours Mary Hunter Austin, author of The Land of Little Rain, who lived in Independence, the town visible about 14.5 km to the west. Her 1903 book of sketches describes the dry Inyo country below the mountain, not alpine heights.

The peak lies in the John Muir Wilderness, east of the Sierra Crest and about 14.5 km west of Independence. Special permits to enter the area have been required in the past because it is habitat for the endangered Sierra Nevada bighorn sheep. The US Forest Service does not advise bringing pack goats.

The North Couloir is a popular climbing route that ascends along the rock face for hundreds of meters. This path draws experienced climbers who need specialized skills for steep alpine routes.