St. Louis Divide
St. Louis Divide Trail is a 12.1-mile trail in Arapaho and Roosevelt National Forests, Colorado. The Forest Service rates it trail class 2, moderately developed. It is open to hiking and horse and pack stock. It enters Byers Peak Wilderness.
Trail conditions, closures and hazards are not tracked here. The Arapaho and Roosevelt National Forests 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 end | 39.8811° N, 105.9463° W · Directions ↗ |
| Other end | 39.8096° N, 105.9042° W · 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 | 12.1 miles |
| Trail class | 2, moderately developed |
| Type | land trail |
| Surface | native material |
| Typical grade | 12-20 percent |
| Typical tread width | 18-24 inches |
| Motor vehicles | Closed to all motorized use year-round |
| Accessibility | Not evaluated |
| National designation | National Scenic or Historic Trail |
| Trail numbers | 17 |
| Forest | Arapaho and Roosevelt National Forests (unit 0210) |
| States | Colorado |
| 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.
Weather by month
Allowed uses
| Hiking | Allowed 06/01 to 11/15 (month/day) |
| Horse and pack stock | Allowed 06/01 to 11/15 (month/day) |
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.
Wilderness
- Byers Peak WildernessFS · about 49% of the line is insideWilderness Connect ↗
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.
Trails nearby
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
- PrescribedHarris Park Broadcast Rx
32 mi from the trail midpoint · 390 acres
- PrescribedFront Country Broadcast Rx
43 mi from the trail midpoint
- WildfireWillow
48 mi from the trail midpoint · 7,359 acres · 92% contained
Distance is to the reported incident point, not the fire edge. Closure orders are on the forest's official page.
Explore
Historic places nearby
Guidebooks for Colorado
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Titles come from Open Library's catalog, matched by subject heading or by title.
Reference
Questions people ask
How long is the St. Louis Divide Trail?
The Forest Service records 12.1 miles under this name in Arapaho and Roosevelt National Forests, the sum of 2 segments.
Source: Forest Service trail layer
What is allowed on the St. Louis Divide Trail?
Hiking and horse and pack stock are allowed. 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 St. Louis Divide Trail start?
The line begins at 39.8811° N, 105.9463° W and ends at 39.8096° N, 105.9042° W. 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 St. Louis Divide Trail in a wilderness area?
Yes. It enters Byers Peak Wilderness. Wilderness rules ban bicycles and motor vehicles and often limit group size.
Source: Byers Peak Wilderness
Where can I camp near the St. Louis Divide Trail?
Sugarloaf Campground (3.3 mi), South Fork Campgound (3.5 mi) and South Fork Group Site (3.6 mi) are within five miles of the trail. The camping section lists all 3 with site counts and booking links.
Source: Campsite Atlas
How developed is the St. Louis Divide Trail?
Trail class 2, which the Forest Service describes as moderately 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 St. Louis Divide Trail?
The typical grade is 12-20 percent. The typical tread is 18-24 inches wide.
Source: Forest Service trail layer
Is the St. Louis Divide Trail a national trail?
Yes. The record marks it as a National Scenic or Historic Trail.
Source: Forest Service trail layer
Who manages the St. Louis Divide Trail?
Arapaho and Roosevelt National Forests, Forest Service unit 0210. The trail is in Colorado.
Source: Arapaho and Roosevelt National Forests official page
Is there a fire near the St. Louis Divide Trail?
The interagency feed shows 3 active incidents within 50 miles of the trail midpoint as of 2026-11-01, the nearest Harris Park Broadcast Rx at 32 miles. Check the forest's closure orders before you go.
Source: Fire nearby
Source
This page is built from 2 segments named St. Louis Divide in the Forest Service TrailNFS_Publish layer, administrative unit 0210. 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 November 1, 2026. The methodology page explains how segments become trails.