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United States
Idaho
Custer County

Lost River Range

The best walks and hikes in the Lost River Range

5.0

(2)

70

hikers

23

hikes

Hikes in the Lost River Range explore Idaho's highest and most rugged mountain range, located within the Salmon-Challis National Forest. The region is characterized by its high-elevation peaks, deep valleys, and remote wilderness terrain. Trails often lead to alpine lakes and feature significant elevation gain, providing options for both demanding and more moderate outings.

Best hiking trails in the Lost River Range

  • The most popular hiking route is Borah Peak Trail — Salmon-Challis National Forest, a 7.9 mile (12.7…

Last updated: August 3, 2026

5.0

(1)

30

hikers

#1.

Borah Peak Trail

11.6km

07:29

1,320m

1,320m

Embark on the Borah Peak Trail for a truly demanding hiking experience, leading you to Idaho's highest point. This difficult route spans 7.2 miles (11.6 km) and challenges you with…

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Hard

5.0

(1)

28

hikers

12.7km

08:34

1,540m

1,540m

Embark on the Borah Peak Trail, a challenging hike that takes you through varied terrain to Idaho's highest point. You will cover 7.9 miles (12.7 km) with a significant elevation…

Hard
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5

hikers

Embark on an easy 3.1-mile (5.0 km) hike along the Lower Cedar Creek Falls Trail, a scenic route that winds through a craggy canyon. You will gain 623 feet (190…

Easy

2

hikers

7.45km

02:42

480m

480m

Discover the Bear Creek Lake Trail, a moderate hiking route that leads you through tree-lined meadows and rugged terrain. This 4.6-mile (7.5 km) journey involves a climb of 1584 feet…

Moderate

3

hikers

5.97km

02:15

420m

420m

Embark on the Merriam Lake Trail, a moderate hike spanning 3.7 miles (6.0 km) with an elevation gain of 1370 feet (417 metres). You can expect to complete this route…

Moderate

1

hikers

Prepare for a demanding ascent on the Mount Church and Donaldson Peak Trail, a difficult hike that covers 7.6 miles (12.3 km). You will conquer a significant 4932 feet (1503…

Hard

3

hikers

11.1km

03:40

560m

560m

Embark on the Pass Lake Trail, a moderate hike that takes you deep into the rugged Lost River Range within the Salmon-Challis National Forest. This route covers 6.9 miles (11.1…

Moderate

Embark on the Leatherman Peak Loop, a difficult 8.4-mile (13.5 km) hike that challenges you with 4963 feet (1513 metres) of elevation gain over an estimated 6 hours and 27…

Hard

3.28km

01:21

280m

280m

Embark on an easy hiking adventure along the Natural Arch Trail, a 2.0-mile (3.3 km) route that guides you to a remarkable geological formation. You will gain 905 feet (276…

Easy

Embark on the Lost River Mountain Super Gully Trail, a difficult hiking route that challenges you with a relentless 4226 feet (1288 metres) of elevation gain over just 4.5 miles…

Hard
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Tips from the Community

Zachary
July 23, 2023, Pass Lake

Pass Lake rests beneath White Cap Peak and is an absolutely beautiful alpine destination. The trail to Pass Lake may be difficult to follow once you get above treeline, but if you come prepared the hike is well worth it.

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Don't follow google maps to the trailhead — the area is well marked and signs will point you in the right direction starting from Bar Rd. You will pass lots of cattle on the way in. The trail is gradual almost the entire way with a short steep sections near the falls. It is rocky in places but you can complete the hike comfortably wearing shoes. This is a popular hike suited for all ages.

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The falls come directly out of the mountain and are stunning any time of year. The lower falls has a bench, but the upper falls is spectacular and well worth the extra effort.

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If the official trailhead to Bear Creek Lake is not accessible, you can park near the fork in the road. You should be able to make it to the fork with a capable SUV. From there follow the trail that climbs steeply (not the creekside trail) from there for a few extra miles. The trail will likely have two large snowfields through midsummer and a couple creek crossings, but the view of the mountains is well worth it.

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Zachary
July 22, 2023, Bear Creek Lake

Bear Creek Lake is a small lake situated amongst the stunning towering peaks of the Lost River range. The trail to the lake may have snow through midsummer, but crampons are not necessary.

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King Mountain natural arch is 80 feet high and made of limestone. The trail leads through mahogany and Douglas fir to ascend to a viewing platform.

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The parking area at the trailhead is fairly small and there are no restrooms or water, so plan accordingly! The trail up to the natural arch is somewhat steep but the views of the arch are spectacular. The trail is clear of snow May through October.

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Zachary
July 22, 2023, Leatherman Peak

Leatherman Peak is the second highest peak in Idaho at over 12,200 ft. It is named after Henry Leatherman, a pioneer from the 1860's. From the top you get spectacular views of the Lost River range.

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Frequently Asked Questions

Are there any easy, family-friendly hikes in the Lost River Range?

Yes, while the range is known for its rugged peaks, there are some easier options. For a shorter walk to a scenic feature, consider the hike to the Natural Arch. It's a relatively short 2-mile (3.2 km) trail that is suitable for most skill levels.

I'm looking for a challenging hike. What do you recommend?

The Lost River Range is famous for its demanding climbs. For a true test of endurance with significant elevation gain, the ascent of Lost River Mountain is a formidable option. This difficult 4.5-mile (7.2 km) route involves a very steep climb to the summit.

Are there any hikes that lead to a waterfall?

Absolutely. The trail to Lower Cedar Creek Falls is a great choice. It's an easy 3.1-mile (5.0 km) hike through the forest that leads directly to the waterfall, making for a rewarding destination.

What are some good options for multi-day backpacking trips?

The remote nature of the range is perfect for backpacking. A great objective is the hike to Pass Lake. This moderate 6.9-mile (11 km) trail takes you to a pristine alpine lake, offering excellent opportunities for secluded camping.

How difficult is the hike to Borah Peak?

The hike to Borah Peak, Idaho's highest point, is extremely challenging and should only be attempted by experienced and well-prepared hikers. The route involves significant elevation gain and a famous, exposed scramble known as Chicken Out Ridge, which requires confidence with heights and basic climbing skills.

Are there bears or other large wildlife in the Lost River Range?

Yes, the region is home to a variety of wildlife, including black bears, mountain goats, bighorn sheep, and mule deer. It is essential to be bear-aware. Store your food securely, especially when camping overnight, make noise while you hike to avoid surprising animals, and carry bear spray and know how to use it.

What is the best time of year to hike in the Lost River Range?

The primary hiking season is from July to September. Due to the high elevation, snow can linger on trails and peaks well into the summer, and early-season snow can begin in the fall. Always check weather forecasts and trail conditions before you go, especially for high-altitude routes.

How many hiking trails are available in the Lost River Range?

There are over 20 hiking routes to explore in the Lost River Range on komoot. These range from difficult mountaineering expeditions to moderate hikes to alpine lakes and easier walks in the valleys.

What should I wear or pack for a day hike here?

Weather can change rapidly in the mountains. It's crucial to dress in layers and pack for a variety of conditions.

Essentials include sturdy hiking boots, a waterproof jacket, extra warm layers, a hat, and gloves. Also, be sure to bring plenty of water, high-energy snacks, a map, a compass or GPS device, a headlamp, and a first-aid kit. Many trails are remote and poorly signed, so self-sufficiency is key.

Are there any circular or loop hikes available?

Yes, for a very challenging loop, you can consider the Leatherman Peak Loop. This is a strenuous 8.4-mile (13.5 km) route with major elevation gain, best suited for experienced mountaineers looking for a full-day adventure.

What are some good hikes to alpine lakes?

The range is dotted with beautiful alpine lakes. Besides the popular Bear Creek Lake, the Merriam Lake Trail is a fantastic moderate option. This 3.7-mile (6.0 km) hike leads to a picturesque lake nestled beneath the high peaks.

What do other hikers enjoy about the Lost River Range?

The area is highly rated by the komoot community. Hikers often praise the dramatic, rugged scenery and the true sense of wilderness. The challenge of summiting Idaho's highest peaks and the beauty of the pristine alpine lakes are frequently mentioned as major highlights.

Where can I park for the Mount Borah hike?

There is a designated trailhead for the main route up the mountain. The Borah Peak Trailhead is a popular and well-regarded starting point for the climb, located off of Birch Springs Road near Mackay.

Most popular attractions in the Lost River Range

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