Routes

Planner

Features

Updates

App

Login or Signup

Get the App

Login or Signup

Routes
Places to see
Mountain passes
North America
United States
Montana

Custer Gallatin National Forest

Top 6 Mountain Passes in Custer Gallatin National Forest

Mountain passes in Custer Gallatin National Forest offer access to a vast expanse of over 3.1 million acres in Montana and a portion of South Dakota. This region features diverse landscapes, from rugged mountains to grasslands, supporting abundant wildlife. The forest's passes provide opportunities for recreation and connect various mountain ranges. It is a significant area for both natural beauty and historical routes.

Best mountain passes in Custer Gallatin National Forest

  • The most popular mountain passes is Targhee Pass –…

Last updated: July 8, 2026

Flathead Pass Eastward

Highlight (Segment) β€’ Mountain Pass

Gorgeous remote gravel/dirt pass through the Bridger range. The west side is poorly-maintained and very loose, steep, and rutted in sections. If on a standard gravel bike, expect 1-2k of …

Tip by

See rides here

Send to Phone

Save

Beartooth Pass Climb

Highlight (Segment) β€’ Climb

The north side of Beartooth Pass offers one of Montana’s most challenging and scenic climbs, leading into the rugged Beartooth Mountains near the Wyoming border. Starting with a gradual incline, …

Tip by

Save

Sign up now to discover places like this

Get recommendations on the best single tracks, peaks, & plenty of other exciting outdoor places.

Sign up for free

Reas Pass

Highlight β€’ Mountain Pass

The Reas Pass lies essentially on the Idaho-Montana border, but modern maps show that the summit lies entirely in Idaho, because the Divide and the state line do not quite …

Tip by

Save

Ross Pass

Highlight β€’ Mountain Pass

At a touch over 7,600 feet, Ross Pass serves as a major trail intersection for four different trails. There are views from this saddle both to the east and west, …

Tip by

Save

Targhee Pass – Montana State Line

Highlight β€’ Mountain Pass

From Targhee Pass it is just 9 miles east to the town of West Yellowstone. For an easy day in/out of town, there are ample camping options littering the trail for about one mile headed north from the pass!

Tip by

Save

Sign up for free to discover even more mountain passes in Custer Gallatin National Forest.

Sign up for free

Already have an account?

Start today with a free account

Your next adventure awaits.

Login or Signup

Popular around Custer Gallatin National Forest

Unforgettable MTB Adventures – IMBA Epic Trails in USA and Canada

Hiking in Custer Gallatin National Forest

MTB Trails in Custer Gallatin National Forest

Road Cycling Routes in Custer Gallatin National Forest

Cycling in Custer Gallatin National Forest

Running Trails in Custer Gallatin National Forest

Gravel biking in Custer Gallatin National Forest

Other adventures in Custer Gallatin National Forest

Unforgettable MTB Adventures – IMBA Epic Trails in USA and Canada

Mountain Biking Collection by

LadyDi

Tips from the Community

Alexandra P
April 29, 2025, Beartooth Pass Climb

The north side of Beartooth Pass offers one of Montana’s most challenging and scenic climbs, leading into the rugged Beartooth Mountains near the Wyoming border. Starting with a gradual incline, the road gradually steepens as it winds south, with breathtaking views of the valley and multiple switchbacks, some with exposed sections. By mile 22, the climb takes you above the treeline into stunning alpine terrain, crossing into Wyoming before a brief descent and a final push to the summit at 10,947 feet.

0

0

Gorgeous remote gravel/dirt pass through the Bridger range. The west side is poorly-maintained and very loose, steep, and rutted in sections. If on a standard gravel bike, expect 1-2k of hike a bike. Bigger tires with a little suspension or a mountain bike are best here. Eastern descent is a bit rough in some sections but far better maintained and a gorgeous descent with breathtaking views of the eastern side of the Bridger Range that takes you through ranch lands, with bonus views of the Crazies in the distance. Grab water at the Pass Creek School or Community Center before heading in. If hot, be sure to bring a water filter, since there is no water for the next 30-40 miles, and this summit can take a long time.

0

0

From Targhee Pass it is just 9 miles east to the town of West Yellowstone. For an easy day in/out of town, there are ample camping options littering the trail for about one mile headed north from the pass!

1

0

Christopher
August 30, 2023, Reas Pass

The Reas Pass lies essentially on the Idaho-Montana border, but modern maps show that the summit lies entirely in Idaho, because the Divide and the state line do not quite coincide here. The pass is also somewhat unusual in that, despite being the lowest crossing of the Divide in the vicinity, it has evidently never been traversed by a highway of any significance.

0

0

Matthew
July 24, 2023, Ross Pass

At a touch over 7,600 feet, Ross Pass serves as a major trail intersection for four different trails. There are views from this saddle both to the east and west, and you can access the summit route to Ross Peak from right here. Have a map and know where you're going this far from the car!

0

0

Frequently Asked Questions

What are some of the most notable mountain passes in Custer Gallatin National Forest?

Beyond the popular Targhee Pass – Montana State Line, other significant passes include Sacagawea Pass in the Bridger Range, known for its challenging hike to Sacagawea Peak, and Bozeman Pass, which holds historical importance from the Lewis and Clark expedition. The Absaroka-Beartooth Wilderness also features passes that lead to unparalleled wilderness experiences.

Are there challenging mountain passes for experienced hikers in Custer Gallatin National Forest?

Yes, for experienced hikers, Sacagawea Pass offers a challenging alpine hike through a glacial cirque towards Sacagawea Peak. Passes within the Crazy Mountains also provide remote and wild experiences with challenging hikes to alpine lakes. Additionally, the Absaroka-Beartooth Wilderness contains rugged, high-elevation passes perfect for backpackers seeking solitude and self-reliance.

Which mountain passes offer the best scenic views?

Many passes offer stunning vistas. Sacagawea Pass provides expansive views of surrounding valleys and mountain ranges. Bozeman Pass offers breathtaking views of the peaks between the Gallatin, Bangtail, and Bridger ranges. The Flathead Pass Eastward offers gorgeous views of ranch lands and the Crazy Mountains. The Beartooth Pass Climb takes you above the treeline into stunning alpine terrain with panoramic views.

Are there family-friendly mountain passes in Custer Gallatin National Forest?

Yes, Targhee Pass – Montana State Line is considered family-friendly, offering ample camping options nearby. While many passes involve more strenuous activity, areas around Bozeman Pass also provide access to trails suitable for various activity levels, including hiking, mountain biking, and equestrian use.

What kind of wildlife can I expect to see around the mountain passes?

The Custer Gallatin National Forest is rich in wildlife. Around Bozeman Pass, you might spot elk, deer, moose, grizzly bears, and cougars. The Absaroka-Beartooth Wilderness is home to moose, elk, mule deer, mountain goats, and bighorn sheep. Always be aware of your surroundings and practice Leave No Trace principles.

Do any mountain passes in the Custer Gallatin National Forest have historical significance?

Yes, Bozeman Pass is historically significant as it was traversed by Sacagawea in 1806 during the Lewis and Clark expedition. The Crazy Mountains also hold cultural significance for the Crow Nation, who have a deep spiritual connection to the area.

What outdoor activities can I do near the mountain passes in Custer Gallatin National Forest?

The region offers a wide range of activities. You can find numerous running trails, including loops near West Yellowstone and Sacagawea Peak. There are also easy hikes like Ousel Falls Trail and Silver Run Trail. For cyclists, challenging road cycling routes like the Beartooth Pass Climb are available. Explore more options on the Running Trails, Easy Hikes, and Road Cycling Routes guides for the Custer Gallatin National Forest.

Are there any passes that offer unique natural features like glaciers or alpine lakes?

Yes, the Absaroka-Beartooth Wilderness, accessible via its passes, features active glaciers and hundreds of alpine lakes. The Crazy Mountains also boast over 40 jewel-like alpine lakes, providing excellent opportunities for trout fishing and stunning scenery.

What is the best time of year to visit the mountain passes in Custer Gallatin National Forest?

The best time to visit is generally from late spring through early fall (June to September) when the passes are typically clear of snow and weather conditions are more favorable for outdoor activities. However, conditions can be unpredictable at higher elevations, especially in the Absaroka-Beartooth Wilderness, so always check local forecasts before your trip.

Are there less crowded mountain passes in Custer Gallatin National Forest?

For a more remote experience, consider passes within the Crazy Mountains, which offer a wild and isolated landscape. The Absaroka-Beartooth Wilderness also provides extensive opportunities for solitude due to its vastness and rugged terrain, making it a 'backpacker's dream' for those seeking less crowded areas.

What do visitors enjoy the most about the mountain passes in Custer Gallatin National Forest?

Visitors frequently praise the breathtaking views, the challenging yet rewarding climbs, and the sense of remote wilderness. Many appreciate the diverse landscapes, from rolling hills to rugged alpine terrain, and the opportunities for wildlife sightings. The historical significance of certain passes also adds to the rich experience.

Most popular routes in Custer Gallatin National Forest

Hiking in Custer Gallatin National Forest

Most popular attractions in Custer Gallatin National Forest

Places to see

Store rating

Get inspired with the komoot mobile app

With aΒ free komoot account, you can easily find, customize, and navigate endless outdoor adventures.

or

Join komoot Now

Store rating

Explore more

See even more epic mountain passes by checking out these guides in Custer Gallatin National Forest:

Glacier CountyGallatin County

Nearby adventure guides

Things to Do in Stillwater County

Natural areas to explore nearby

Things to Do in Dubois Badlands Wilderness Study Area

background

Get ready to conquer new peaks

Sign up for Free

Explore
RoutesRoute plannerFeaturesHikesMTB TrailsRoad cycling routesBikepackingSitemap
Download the app
Follow Us on Socials

Β© komoot GmbH

Privacy Policy