Mount Langley is a mountain located on the crest of the Sierra Nevada, on the boundary between Inyo and Tulare counties in eastern California, in the United States.

Mount Whitney, the highest peak in the contiguous United States, lies 4.8 miles (7.7 km) to the northwest.

From there hikers travel cross-country to Old Army Pass, where they may pick up the recently constructed Class 1 Mount Langley Trail, which follows a series of large rock cairns for the two mile push to the summit.

New Army Pass sits on a south-facing slope and it tends to clear of snow somewhat earlier in the season.

During the winter months, even the paved road to Horseshoe Meadow is closed, making the summit significantly harder to reach.