Bitterroot National Forest · Idaho, Montana · Trail 430

Lost Horse

Lost Horse Trail is a 25.5 miles trail in Bitterroot National Forest, Idaho and Montana. The forest has not published allowed uses for it. It enters Selway-Bitterroot Wilderness.

Trail conditions, closures and hazards are not tracked here. The Bitterroot National Forest official page carries current alerts and closure orders.

Map

One end Other endLine simplified to about 100 metres. Basemap from the USGS National Map.

One end46.1649, -114.5030 · Directions ↗
Other end46.1267, -114.9162 · Directions ↗

The ends are the two ends of the longest connected chain of segments. The record does not say which is the usual start.

The trail

Length25.5 miles
Typeland trail
AccessibilityNot evaluated
Trail numbers430
ForestBitterroot National Forest (unit 0103)
StatesIdaho, Montana
Detail publishedcenterline only

Values are the set across all segments. Class 1 is minimally developed and class 5 is fully developed. Grade and width are the forest's typical values, not measured extremes.

Wilderness

Inside a designated wilderness, bicycles and motor vehicles are prohibited by law regardless of the trail record, and permits or group limits may apply.

Trailheads

The Forest Service recreation layer records no trailhead within a third of a mile of this trail's line. Many trails start from a road pullout or another trail with no trailhead record. The forest's recreation pages list the trailheads it does publish.

Distance is from the point to the nearest part of the trail line. Season text is what the forest wrote and is often a season name rather than a date. The recreation page link goes to the Forest Service site, which may redirect to the forest's recreation index.

Camping nearby

Campsite Atlas cards carry site counts and booking links from Recreation.gov. Forest Service cards come from the recreation layer and link the agency page.

Fire nearby

  • Wildfire
    North Fork Lost Horse

    18 mi from the trail midpoint · 118 acres · 70% contained

  • Wildfire
    Three Links

    19 mi from the trail midpoint · 927 acres · 21% contained

  • Wildfire
    Wolf Creek

    20 mi from the trail midpoint · 2,643 acres · 50% contained

  • Wildfire
    Grotto

    20 mi from the trail midpoint · 3,856 acres · 20% contained

Distance is to the reported incident point, not the fire edge. Closure orders are on the forest's official page.

Limited data for this unit

Bitterroot National Forest publishes this trail as a centerline only, with no class, surface or allowed uses. What is here is the name, the length and the line. The forest office has the rest.

Checked nightly. Sections appear as soon as the forest publishes more.

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Reference

Questions people ask

How long is the Lost Horse Trail?

25.5 miles, the sum of the 1 segment the Forest Service records under this name in Bitterroot National Forest.

Source: Forest Service trail layer

What is allowed on the Lost Horse Trail?

Bitterroot National Forest has not published allowed uses for this trail. The forest office can say what is open.

Source: Bitterroot National Forest official page

Where does the Lost Horse Trail start?

The line begins at 46.1649, -114.5030 and ends at 46.1267, -114.9162. No Forest Service trailhead is recorded within a third of a mile of it. The record does not say which end is the usual start.

Source: Forest Service trail layer

Is the Lost Horse Trail in a wilderness area?

Yes. It enters Selway-Bitterroot Wilderness. Wilderness rules ban bicycles and motor vehicles and often limit group size.

Source: Selway-Bitterroot Wilderness Wilderness

Where can I camp near the Lost Horse Trail?

Schumaker Campground (1 mi) and Lost Horse Guard Station (2.3 mi) are within five miles of the trail. Site counts and booking links are on Campsite Atlas.

Source: Campsite Atlas

Who manages the Lost Horse Trail?

Bitterroot National Forest, Forest Service unit 0103. The trail is in Idaho and Montana.

Source: Bitterroot National Forest official page

Is there a fire near the Lost Horse Trail?

4 active incidents within 50 miles of the trail midpoint as of 2026-09-17, the nearest North Fork Lost Horse at 18 miles. Check the forest's closure orders before you go.

Source: Fire nearby

Source

This page is built from 1 segment named LOST HORSE in the Forest Service TrailNFS_Publish layer, administrative unit 0103. Wilderness overlap is tested against the National Wilderness Preservation System layer from Wilderness Connect. Trailheads and Forest Service campgrounds come from the Forest Service Recreation Opportunities layer. Data refreshed September 17, 2026. The methodology page explains how segments become trails.