Red Peak is an 11,699-foot summit in Yosemite National Park’s Clark Range, the second-highest peak in that group and a prominent mountain southeast of Yosemite Valley. It is best known for its reddish color, created when iron-bearing minerals in its granite weather into iron rust. Water from the mountain flows into tributaries of the Merced River, and its elevation gives it an alpine climate shaped by Pacific storms rising over the Sierra Nevada. First called Red Mountain by the Whitney Survey, it officially became Red Peak in 1932. By 1870 the California Geological Survey had climbed it, and in 1920 Ansel Adams placed a Sierra Club register on the summit.