Big Creek Peak is an 11,350-foot mountain in Idaho’s Lemhi Range, located in Lemhi County on the boundary between Caribou-Targhee National Forest and Salmon-Challis National Forest. Its summit stands about 1.1 miles northwest of Flatiron Mountain and 23.7 miles northwest of Bell Mountain, which is its line parent. At 11,350 feet, Big Creek Peak ranks as the 55th highest peak in Idaho.