Basin Mountain, Mountain summit in Inyo County, United States.

Basin Mountain is a summit in the high country of the eastern Sierra Nevada near Bishop, California. The peak rises to about 4,000 meters and offers multiple routes for different climbing experiences.

The sources record no first-ascent date, route or climber for Basin Mountain, so its climbing history is undocumented. The peak stands above the Buttermilks west of Bishop, in Inyo County, and rises to 3,994 metres, about 123 metres above the surrounding terrain. Its neighbour Mount Tom, 3.2 kilometres away, reaches 4,207 metres.

From Bishop, Basin Mountain closes the view west above the Buttermilks, and the summit gives a night view over Bishop and the Owens Valley. The peak is climbed by an easy scramble, and its summit is valued less for itself than for the view of Mount Tom to the north.

Access starts from the Horton Lakes Trailhead, where an old mining road leads the way. The route is relatively open and easy to navigate, with climbers finding various ascent options from that point.

Basin Mountain rises above the Buttermilks and dominates Bishop's western view, though Mount Tom and Mount Humphreys are taller. From the summit, Mount Tom fills the skyline just to the north, and at night the lights of Bishop and the Owens Valley are visible below.