North Supply Loop
North Supply Loop is a 6.3 miles trail in Arapaho and Roosevelt National Forests, Colorado. The Forest Service rates it trail class 3 to 4, developed to highly developed. It is open to hiking, horse and pack stock, mountain biking, motorcycle, atv, e-bikes, snowmobile, snowshoeing and cross-country skiing.
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 | 40.2899, -105.8952 · Directions ↗ |
| Other end | 40.2898, -105.8951 · 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 | 6.3 miles |
| Trail class | 3, developed; 4, highly developed |
| Type | snow trail, land trail |
| Surface | native material, snow |
| Typical grade | 5-8 percent, 12-20 percent |
| Typical tread width | over 120 inches, 18-24 inches |
| Motor vehicles | Open to at least one motorized use |
| Accessibility | Not evaluated |
| Trail numbers | 124, SNO-124 |
| 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.
Allowed uses
| Hiking | Allowed 06/15 to 11/15 (month/day) |
| Horse and pack stock | Allowed 06/15 to 11/15 (month/day) |
| Mountain biking | Allowed 06/15 to 11/15 (month/day) |
| Motorcycle | Allowed 06/15 to 11/15 (month/day) |
| ATV | Allowed 06/15 to 11/15 (month/day) |
| E-bikes | Allowed 06/15 to 11/15 (month/day) |
| Snowmobile | Allowed 11/16 to 05/31 (month/day) |
| Snowshoeing | Allowed 11/16 to 05/31 (month/day) |
| Cross-country skiing | Allowed 11/16 to 05/31 (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.
Trailheads
No season published · listed none | 0 mi |
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.
Explore
Park units nearby
Reference
Questions people ask
How long is the North Supply Loop?
6.3 miles, the sum of the 2 segments the Forest Service records under this name in Arapaho and Roosevelt National Forests.
Source: Forest Service trail layer
What is allowed on the North Supply Loop?
hiking, horse and pack stock, mountain biking, motorcycle, atv, e-bikes, snowmobile, snowshoeing and cross-country skiing. The trail is open to at least one motorized use. Some uses are seasonal. The allowed uses section lists the dates.
Source: Forest Service trail layer
Where does the North Supply Loop start?
The line begins at 40.2899, -105.8952 and ends at 40.2898, -105.8951. The nearest recorded trailhead is North Supply Trailhead, 0 miles from the line. The record does not say which end is the usual start.
Source: Forest Service trail layer
Is the North Supply Loop 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 North Supply Loop?
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.
Source: Arapaho and Roosevelt National Forests official page
How developed is the North Supply Loop?
Trail class 3 to 4, which the Forest Service describes as developed to highly 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 North Supply Loop?
The typical grade is 5-8 percent on most segments and 12-20 percent on others. The typical tread is over 120 inches wide.
Source: Forest Service trail layer
Who manages the North Supply Loop?
Arapaho and Roosevelt National Forests, Forest Service unit 0210. The trail is in Colorado.
Source: Arapaho and Roosevelt National Forests official page
Source
This page is built from 2 segments named NORTH SUPPLY LOOP 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 September 17, 2026. The methodology page explains how segments become trails.