Horstmann Peak, Mountain summit in Sawtooth Range, Idaho, United States
Horstmann Peak is a mountain summit in the Sawtooth Range that rises to about 10,475 feet. The peak has several established climbing routes of varying difficulty ranging from moderate scrambles to technical lines.
The peak was first summited in 1934 by Robert and Merriam Underhill along with Dave Williams during a summer expedition. This early ascent opened the mountain to climbing activity that continues in the decades since.
The peak draws climbers looking for varied routes and technical challenges in the high country. Visitors experience the appeal of mountaineering in a setting valued by those seeking mountain adventures.
Access begins at the Fishhook Creek trailhead near Redfish Lake, where visitors must obtain a self-issued wilderness permit before starting. The approach crosses remote terrain and snow cover varies by season, so planning around weather conditions helps with timing.
The Sickle Couloir route maintains snow year-round and requires class 3+ scrambling skills for its final sections. This corridor stands out among the other approaches for its consistent frozen conditions and the specialized winter mountaineering skills needed.
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