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Routes
Hiking trails & Routes
United States
Montana
Flathead County

Main South Fork Trail

Hard

3.0

(5)

50

hikers

Main South Fork Trail

08:01

28.4km

600m

Hiking

Prepare for a challenging day on the Main South Fork Trail, a difficult hiking route that spans 17.7 miles (28.4 km) and involves a significant 1962 feet (598 metres) of elevation gain. You can expect to spend around 8 hours traversing this demanding path. As you hike, you will experience…

Last updated: April 23, 2026

Waypoints

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Start point

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1

1.16 km

Fireweed Field in Flathead National Forest

Highlight • Forest

Start early to beat the crushing midday heat and admire the ocean of fireweed along the way. There’s plenty of wildlife too so be on the lookout.

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28.4 km

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Way Types & Surfaces

Way Types

28.4 km

Surfaces

28.4 km

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Elevation

Elevation

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Highest point (1,330 m)

Lowest point (1,200 m)

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Weather

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Today

Tuesday 26 May

24°C

12°C

66 %

Additional weather tips

Max wind speed: 15.0 km/h

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This route was planned by komoot.

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Frequently Asked Questions

What is the overall difficulty of the Main South Fork Trail?

This trail is rated as difficult. While some sources might suggest easier sections, the full route as described on komoot covers a significant distance of approximately 28.4 km (17.6 miles) with nearly 600 meters (1,968 feet) of elevation gain, making it a challenging endeavor suitable for experienced hikers.

How long does it typically take to hike this trail?

The estimated duration for completing the Main South Fork Trail is around 8 hours, based on the total distance and elevation changes. This is a point-to-point trail, so plan for transportation at the end or consider it as part of a multi-day backpacking trip.

What kind of terrain can I expect on the route?

The trail traverses incredible country within the Bob Marshall Wilderness, offering beautiful and challenging landscapes. You can expect varied terrain, including sections with deep green water and canyons, especially towards the Meadow Creek Gorge. Given its wilderness setting, expect natural, unpaved surfaces that can be rugged.

Are dogs allowed on the Main South Fork Trail?

Yes, dogs are generally allowed on trails within the Flathead National Forest and Bob Marshall Wilderness. However, it's crucial to keep them on a leash to protect wildlife and ensure a pleasant experience for all users. Always practice Leave No Trace principles, including packing out all pet waste.

What is the best time of year to hike the Main South Fork Trail?

The best time to hike this trail is typically during the summer and early fall months (July through September). During this period, snow has usually melted at higher elevations, and the weather is generally more stable. Always check current trail conditions and weather forecasts before heading out, as conditions can change rapidly in a wilderness area.

Do I need a permit or is there an entrance fee for the Flathead National Forest?

While there isn't a specific entrance fee for the Flathead National Forest itself, some activities or designated areas might require permits (e.g., for overnight backpacking in certain wilderness areas, or commercial use). For day hiking the Main South Fork Trail, a permit is generally not required, but it's always best to check the latest regulations with the Flathead National Forest service before your trip, especially if planning an overnight stay.

What natural features or viewpoints can I see along the way?

The trail offers breathtaking scenery throughout the Bob Marshall Wilderness. A notable highlight is the Fireweed Field in Flathead National Forest. Additionally, the scenic beauty of the South Fork of the Flathead River is prominent, especially as you approach the Meadow Creek Gorge, with its deep green water and canyons.

Does the Main South Fork Trail connect with other trails?

Yes, the route is part of a larger network within the Bob Marshall Wilderness. The komoot route for the Main South Fork Trail also passes through sections of the Main South Fork Trail, Meadow Creek Gorge Trail, Main East Side South Fork Trail, Picture Ridge Trail, and West Side South Fork Trail, offering opportunities for extended exploration.

What are the parking and trailhead access options for this trail?

Due to the remote nature of the Bob Marshall Wilderness, specific trailhead parking details can vary. Access points are typically found at the edges of the wilderness area. It's recommended to consult detailed maps or contact the Flathead National Forest ranger district for the most current and precise information on trailhead locations and parking availability, especially given the trail's point-to-point nature.

Is fishing a popular activity along the Main South Fork Trail?

Yes, fishing is a popular activity in the South Fork of the Flathead River, which this trail is associated with. The remote wilderness setting provides excellent opportunities for anglers looking to experience pristine waters. Be sure to check Montana's fishing regulations and acquire any necessary licenses before you go.

What makes this trail a 'hidden gem' or unique experience?

The Main South Fork Trail offers a true wilderness experience within one of the largest wilderness areas in the lower 48 states. Its remoteness provides a unique opportunity to 'get away from it all' and immerse yourself in untouched nature, far from crowds. It's an ideal choice for those seeking solitude and a challenging adventure.

Nearby routes

Hard

Main South Fork Trail

08:01h

28.4km

600m

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