Mount Heyburn, Mountain summit in Sawtooth Range, Idaho, US

Mount Heyburn is a 10,229-foot (3,118 m) summit in the Sawtooth Range of Custer County, Idaho, within the Sawtooth Wilderness. It and Grand Mogul (9,733 ft) frame the southwest end of Redfish Lake, and its two peaks rise above the lake's south campground.

Mount Heyburn was named for Weldon Heyburn, a U.S. Senator from Idaho who held office from 1903 until his death in 1912. The first recorded ascent came in 1935, when Robert and Merriam Underhill climbed with Dave Williams by the Southwest Ridge route.

The peak carries the name of Weldon Heyburn, who represented Idaho in the U.S. Senate from 1903 until his death in 1912. The name places the summit among the Sawtooth peaks named for public figures of that era.

Climbers reach this summit by starting at Redfish Lake and following either the Bench Lake Trail or the Redfish Lake Creek Trail to establish a base camp. Weather and snow conditions vary greatly by season, so visiting during warmer months offers safer and more accessible routes.

The Stur Chimney route stands out as a notable climbing feature that requires climbers to navigate overhanging stone formations on Grade II, 5.4 rated granite terrain. This specialized passage offers rock climbing elements that differ markedly from straightforward summit hikes.