Idaho is one of the most mountainous states in the western United States, with rugged peaks, deep river canyons, alpine lakes, and vast wilderness areas. The state is best known for the Rocky Mountains, especially the Sawtooth Range, Bitterroot Range, and Lost River Range. Its highest summit, Borah Peak, rises above remote high country that attracts hikers, climbers, anglers, and backcountry travelers.
Idaho state includes 2 608 mountains and 76 mountain ranges
Idaho’s mountain landscape is dominated by several major ranges. The Rocky Mountains form the backbone of the state, while the Sawtooth Range is famous for sharp granite spires and alpine lakes. The Bitterroot Range marks part of the border with Montana, and the Lost River Range contains the state’s tallest peaks. Other important ranges include the Salmon River Mountains, Clearwater Mountains, White Cloud Mountains, and Boulder Mountains. Many of these areas are protected by national forests and wilderness zones, making them ideal for hiking, climbing, and wildlife viewing.
Borah Peak is the highest mountain in Idaho, reaching 12,662 feet in the Lost River Range. It is followed by Leatherman Peak, Mount Church, Mount Breitenbach, and Mount Idaho, all of which are also in the same rugged range. These summits are known for steep slopes, loose rock, and exposed ridgelines, so they are more demanding than many other western peaks. Most climbs require strong fitness, route-finding skills, and good weather. Snow can linger well into summer, especially on north-facing slopes and in shaded cirques.
Some of the most iconic and scenic mountains in Idaho are found in the Sawtooth Range. Thompson Peak is the highest point in the range and a favorite among experienced climbers. Hyndman Peak is another well-known summit, offering a classic alpine setting near Ketchum. In the central part of the state, the White Cloud Mountains are admired for their dramatic granite peaks and clear lakes. The Boulder Mountains and Pioneer Mountains are also popular for their scenic beauty, solitude, and access to backcountry trails.
Idaho offers excellent mountain hikes for all levels. The Alpine Way Trail in the Sawtooth Wilderness is one of the most famous routes, with lake views and high passes. Redfish Lake to Alpine Lake is a classic day hike with strong scenery and steady elevation gain. In the White Cloud Mountains, the Fourth of July Lake Trail is a popular choice for alpine views and wildflower displays. The Hyndman Peak Trail is a strenuous climb for experienced hikers, while Borah Peak is a serious objective for strong mountaineers. For easier outings, many trailheads near Stanley, Ketchum, and McCall provide access to scenic mountain terrain.
Mountaineering in Idaho ranges from straightforward scrambles to demanding alpine climbs. The standard route on Borah Peak is usually rated Class 3, with steep loose rock and a narrow ridge near the summit. Leatherman Peak is commonly climbed by a Class 2 to Class 3 route, depending on conditions. In the Sawtooth Range, Thompson Peak often involves Class 3 scrambling and route-finding on exposed terrain. Hyndman Peak is a long Class 2 climb with a steep upper section. Winter and spring ascents can require ice axe and crampons, while summer climbs may still involve snowfields, scree, and unstable talus. Many routes are remote, so navigation and self-sufficiency are important.
Several outfitters and guiding services operate in Idaho, especially around Stanley, Ketchum, and the Sawtooth National Recreation Area. Sawtooth Mountain Guides is one of the best-known local companies for hiking, climbing, and alpine instruction; typical private guiding rates often start around $400 to $700 per day, depending on group size and objective. Sun Valley Trekking offers guided hikes, backpacking, and mountain adventures, with many trips priced from about $250 to $600 per person for day or short multi-day outings. Lost River Mountain Guides is a respected option for technical climbs and custom trips, with private days commonly ranging from $450 to $800. Prices vary by season, route, and equipment needs.
The best time to visit the mountains of Idaho is usually from late June through September, when most high trails are snow-free and mountain roads are open. July and August offer the most reliable hiking and climbing conditions, especially in the Sawtooth Range and Lost River Range. Wildflowers are often at their peak in early summer, while fall brings cooler temperatures and fewer crowds. Spring can be wet and snowy at higher elevations, and winter is best for snow sports rather than alpine hiking. Weather changes quickly in the mountains, so even summer trips should be planned with extra layers and rain protection.
Mountain travel in Idaho often means long distances, limited services, and changing weather. Fuel up before entering remote areas, especially near the Sawtooth Wilderness or the Lost River Range. Cell service can be weak or unavailable, so carry maps and a backup navigation tool. Bear spray is recommended in some areas, and proper food storage is important in wilderness camps. Many trailheads fill early in summer, so arrive early for parking. If you plan to climb peaks like Borah Peak or Thompson Peak, check snow conditions, bring enough water, and be prepared for loose rock and exposure. Respect private land, fire restrictions, and wilderness regulations.
Idaho has one of the largest wilderness systems in the lower 48 states, and much of it is mountainous. Borah Peak is not only the state high point but also one of the most prominent summits in the Lost River Range. The Sawtooth Range is named for its jagged skyline, which resembles a row of saw blades. The White Cloud Mountains are known for bright granite and reflective alpine lakes. Many Idaho peaks remain lightly visited compared with mountains in nearby states, which gives the state a strong sense of solitude and backcountry adventure. The Salmon River system also cuts through some of the deepest canyons in North America.
