4.9
(7072)
19,371
hikers
05:56
21.3km
410m
Hiking
Hike the difficult 13.2-mile Big River Trail in Montana's Great Bear Wilderness, gaining 1335 feet with views of the Middle Fork Flathead Ri
Last updated: February 26, 2026
Waypoints
Start point
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35 m
Highlight (Segment) • Trail
Tip by
10.6 km
Highlight • River
Tip by
21.3 km
End point
Way Types & Surfaces
Way Types
21.3 km
Surfaces
21.3 km
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Elevation
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This route was planned by komoot.
This is a difficult hike, spanning over 21 kilometers with an elevation gain of approximately 407 meters. It's a challenging singletrack trail within the Great Bear Wilderness, suitable for experienced hikers.
The Great Bear Wilderness, where this trail is located, generally does not require permits for day hiking. However, specific regulations may apply for overnight stays or group sizes. Always check with the Flathead National Forest for the most current rules and any potential fees before your visit.
As a general rule, dogs are permitted in the Great Bear Wilderness, but they must be kept under control at all times, preferably on a leash, to protect wildlife and ensure a pleasant experience for all users. Please pack out all waste.
The best time to hike this trail is typically from late spring through early fall (June to September) when the snow has melted and weather conditions are most favorable. Winter hiking can be challenging due to heavy snow and colder temperatures.
Specific parking information for this particular Big River Trail in the Great Bear Wilderness is best obtained from the Flathead National Forest service or local ranger stations, as access points can vary and may require forest road navigation.
The Big River Trail is a singletrack trail, meaning it's a narrow path. Expect varied terrain typical of a wilderness area, potentially including rocky sections, roots, and uneven surfaces, especially given its 'difficult' rating.
The trail offers stunning views of the surrounding wilderness. You'll follow the Middle Fork Flathead River and experience the natural beauty of the Big River Trail itself, immersed in the pristine environment of the Great Bear Wilderness.
Yes, while the primary route is the Big River Trail, it also passes through sections of the Spruce Crossing Trail, Edna Creek Trail, and Vinegar Mountain Trail. There are also other segments identified as Big River Trail that intersect the main path.
Based on its length and typical wilderness trail design, this route is primarily an out-and-back trail. Hikers will generally return along the same path unless connecting to other trails for a longer, custom route.
As the trail is located within the Great Bear Wilderness, you are in prime habitat for various wildlife, including deer, elk, black bears, and potentially grizzly bears. Always carry bear spray, know how to use it, and practice Leave No Trace principles to minimize your impact.
While the trail follows the Middle Fork Flathead River, it's crucial to filter or treat any water collected from natural sources to prevent illness. Always carry sufficient water for your hike, especially on a difficult and lengthy trail like this.
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