Little Brother sits on the main Lemhi Range crest between Big Sister and Midway Mountain. Rick Baugher made the first recorded ascent though he has not shared his route information.
Larry Prescott climbed the peak on an epic 13-mile, 7,300-foot elevation gain, 6-peak day, where he traversed to the peak from Big Sister to the south to Midway Mountain to the north. This route is detailed in his trip report: Lemhi Enchainment, Little Sister to Foss Mountain.
Class 2 via Larry’s route.
USGS Topo: Bell Mountain
Little Brother from the south. Larry Prescott photo.
The summit of Little Brother is graced by this unusual formation. Midway Mountain is in the background. Larry Prescott photo.