MT. Elmo
MT. Elmo Trail is a 8.8 miles trail in Helena-Lewis and Clark National Forest, Montana. The Forest Service rates it trail class 3, developed. It is open to hiking, horse and pack stock and mountain biking.
Trail conditions, closures and hazards are not tracked here. The forest office carries current alerts and closure orders.
Map
One end Other endLine simplified to about 100 metres. Basemap from the USGS National Map.
| One end | 46.2747, -110.4249 · Directions ↗ |
| Other end | 46.2723, -110.5236 · 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 is recorded as 2 segments.
The trail
| Length | 8.8 miles |
| Trail class | 3, developed |
| Type | land trail |
| Surface | native material |
| Typical tread width | 18-24 inches |
| Motor vehicles | Closed to all motorized use year-round |
| Accessibility | Evaluated and does not meet accessibility guidelines |
| Trail numbers | 642 |
| Forest | Helena-Lewis and Clark National Forest (unit 0115) |
| States | Montana |
| Detail published | management level, with uses |
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.
Allowed uses
| Hiking | Allowed year-round |
| Horse and pack stock | Allowed 05/01 to 11/30 (month/day) |
| Mountain biking | Allowed year-round |
A use is listed when the Forest Service records it as managed, accepted or discouraged on any segment. Discouraged still means legal. Uses marked restricted are left out. Where the forest publishes a Motor Vehicle Use Map, that map governs motorized use.
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.
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
No federal campground is recorded within five miles of the trail. Dispersed camping is allowed on most National Forest land outside posted closures. The forest office has the current rules.
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.
Reference
Questions people ask
How long is the MT. Elmo Trail?
8.8 miles, the sum of the 2 segments the Forest Service records under this name in Helena-Lewis and Clark National Forest.
Source: Forest Service trail layer
What is allowed on the MT. Elmo Trail?
hiking, horse and pack stock and mountain biking. The trail is closed to motor vehicles year-round. Some uses are seasonal. The allowed uses section lists the dates.
Source: Forest Service trail layer
Where does the MT. Elmo Trail start?
The line begins at 46.2747, -110.4249 and ends at 46.2723, -110.5236. 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 MT. Elmo Trail in a wilderness area?
No. The trail line does not cross any polygon in the National Wilderness Preservation System layer.
Source: Wilderness Connect
Where can I camp near the MT. Elmo Trail?
No federal campground is recorded within five miles of the trail. Dispersed camping is allowed on most National Forest land outside posted closures. The forest office has the current rules.
How developed is the MT. Elmo Trail?
Trail class 3, which the Forest Service describes as developed. Class 1 is a minimal, unimproved route and class 5 is fully developed, often paved.
Source: Forest Service trail layer
How steep and how wide is the MT. Elmo Trail?
The typical tread is 18-24 inches wide.
Source: Forest Service trail layer
Is the MT. Elmo Trail accessible?
No. The Forest Service evaluated it and found it does not meet its accessibility guidelines.
Source: Forest Service trail layer
Who manages the MT. Elmo Trail?
Helena-Lewis and Clark National Forest, Forest Service unit 0115. The trail is in Montana.
Source
This page is built from 2 segments named MT. ELMO in the Forest Service TrailNFS_Publish layer, administrative unit 0115. 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.