Trail Overview

Bob Marshall Wilderness Trail is a 16.0-mile point-to-point trail in Gibson Reservoir, Lewis and Clark NF, MT, Montana, gaining 2400 feet on a dirt surface as a point-to-point route. Typical completion time: 8 hours.

Trail at a Glance

  • Distance: 16.0 miles · point-to-point
  • Elevation Gain: 2400 feet
  • Difficulty: Difficult
  • Surface: dirt
  • Season: July–September
  • Time: 8 hours
  • Fee: Free
  • Dogs: No
  • Permit: No

What to Expect

The trail begins in Gibson Reservoir, Lewis and Clark NF, MT and showcases the natural character of Montana. The dirt surface is manageable for most hikers, and the route is clearly marked throughout. At Difficult difficulty, this trail rewards the effort with scenery and experiences that define outdoor recreation in Montana.

The 2400-foot elevation change shapes the experience. The ascent builds steadily before the turnaround or loop completion returns you to the trailhead. Stay alert for wildlife and changing weather conditions common to Montana trails.

Planning Your Visit

No entrance fee. Dogs not permitted. No permit required. Arrive early on weekends to secure parking. Bring at least 2 liters of water per person and energy-dense snacks. Layered clothing is essential for mountain and high-elevation environments.

What to Pack

  • Water: 2+ liters per person
  • Navigation: Download the GPX file before heading out
  • Sun protection: Sunscreen, hat, sunglasses
  • Layers: Wind layer and warm mid-layer
  • First aid: Basic kit with blister care

Getting There

The trailhead for Bob Marshall Wilderness Trail is located in Gibson Reservoir, Lewis and Clark NF, MT, Montana. Confirm current conditions with the managing agency before your visit. Download the GPX file for navigation.

Leave No Trace

Stay on the designated trail, pack out all waste including food scraps and pet waste, keep dogs leashed, and respect wildlife by maintaining distance. Your care preserves these trails for future visitors.

Download the GPX File

Free GPX download available on this page. Load it into Garmin, Gaia GPS, AllTrails, or any compatible navigation app before leaving cell service.