Glassford Peak is an 11,602-foot mountain in central Idaho's Boulder Mountains, within the Hemingway–Boulders Wilderness of the Sawtooth National Recreation Area. Near the Blaine County border, it is the third highest peak in its range and the 39th highest in Idaho. The mountain is generally approached from the south side of Idaho State Highway 75 between Stanley and Challis, with another access route from Highway 75 north of Ketchum. Its location in a protected wilderness places it among some of Idaho's higher and more remote mountain landscapes.