Buck Mountain is an mountain summit located in the Glacier Peak Wilderness of the North Cascades in Washington state. The mountain is situated in Chelan County, in the Wenatchee National Forest. Its nearest higher peak is Clark Mountain, to the southwest, and Brahma Peak is set to the south. Precipitation runoff from it drains into Buck Creek, Chiwawa River, and Napeequa River, each a tributary of the Wenatchee River. The mountain's name was applied by Albert Hale Sylvester (1871-1944), a pioneer surveyor, explorer, topographer, and forest supervisor in the Cascades.