Parker Peak is a 12,861-foot-elevation (3,920-meter) mountain summit located in the Sierra Nevada mountain range, in Mono County of northern California, United States. It is situated in the Ansel Adams Wilderness, on land managed by Inyo National Forest. It is approximately 7.0 miles (11.3 km) northwest of the community of June Lake, 1.2 miles (1.9 km) east of Yosemite National Park's eastern boundary, and 1.0 mile (1.6 km) east of Koip Peak, the nearest higher neighbor. The mountain is visible from the June Lake Loop, and from the nearby June Mountain ski area. Topographic relief is significant as it rises over 5,700 feet above Grant Lake in four miles. This geographical feature's name has been officially adopted by the U.S. Board on Geographic Names. The first ascent of the summit was made in 1914 by Norman Clyde.