Idaho 12,000ft Mountain List
Idaho 12ers: Complete List and Hiking Guide
Idaho is home to nine peaks over 12,000 feet, commonly known as the Idaho 12ers. Most are located in the rugged Lost River Range, with one in the Pioneer Mountains. Some are straightforward alpine hikes, while others require exposed Class 3 scrambling, loose rock tolerance, and careful route-finding.
Below is a complete list of Idaho’s 12ers, with links to detailed route pages for each mountain. Whether you are planning your first Idaho highpoint or working through the full list, these guides include route descriptions, maps, GPX files, and practical tips to help you prepare.
Borah Peak – 12,662 feet
Idaho’s highest peak is the most famous 12er in the state and home to the exposed Chicken Out Ridge. It is the classic Idaho highpoint and often the starting point for hikers exploring the rest of the list.
Leatherman Peak – 12,228 feet
Idaho’s second-highest mountain offers a more remote and rugged experience than Borah. The Northeast Gully is the standard route, while the West Ridge is shorter but more serious.
Mount Church – 12,200 feet
Mount Church is most often climbed with Donaldson Peak on the same outing. The route features a beautiful high cirque, extended time above treeline, and an exposed ridge traverse between summits.
Diamond Peak – 12,197 feet
The tallest Idaho peak outside the Lost River Range, Diamond is one of the best scrambles on the list. Its long ridge offers enjoyable route-finding and a good progression step for confident hikers.
Mount Breitenbach – 12,140 feet
Breitenbach is one of the more approachable Lost River 12ers, with a slow approach up Pete Creek followed by enjoyable scrambling higher on the route. It makes a good introduction to Idaho’s rougher high peaks.
Lost River Peak – 12,078 feet
Short but brutal, Lost River Peak is known for its steep scree-filled Super Gully. It is one of the most mentally and physically exhausting climbs on the list despite its modest mileage.
Mount Idaho – 12,065 feet
Also known as Elkhorn Peak, Mount Idaho is a rugged Lost River climb with steep talus chutes, route-finding, and loose rock. It is a rewarding summit, but not one to underestimate.
Donaldson Peak – 12,023 feet
Donaldson Peak is typically paired with Mount Church on the same hike. While it can be overlooked on its own, the combined outing makes for one of the most memorable two-summit days in Idaho.
Hyndman Peak – 12,009 feet
Hyndman Peak is the shortest Idaho 12er, but also one of the most scenic. Its long approach through Hyndman Basin makes it a favorite for hikers looking for a beautiful and relatively approachable alpine objective.
Want everything in one place? My guidebook covers all of Idaho’s 12ers with detailed routes, maps, and practical tips to help you plan your climbs.
