Ryan Peak, at 11,714 feet (3,570 m) above sea level is the highest peak in the Boulder Mountains of Idaho.

Located in Custer County, Ryan Peak is about 0.5 miles (800 m) north of the Blaine County border.

The peak is also on the border of Sawtooth National Recreation Area and Salmon-Challis National Forest and partially within the Hemingway–Boulders Wilderness.

The primary route to Ryan Peak begins north of Ketchum along Idaho State Highway 75 at the Sawtooth National Recreation Area headquarters.

Take national forest road 146 north from the headquarters until you reach the trailhead at the end of the road.