Greenhorn
Greenhorn Trail is a 8.2 miles trail in Pike and San Isabel National Forests, Colorado. The Forest Service rates it trail class 2, moderately developed. It is open to hiking, horse and pack stock and mountain biking. It enters Greenhorn Mountain Wilderness.
Trail conditions, closures and hazards are not tracked here. The Pike and San Isabel 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 | 37.9213, -104.9674 · Directions ↗ |
| Other end | 37.8939, -105.0414 · 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 4 segments.
The trail
| Length | 8.2 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 |
| Trail numbers | 1316 |
| Forest | Pike and San Isabel National Forests (unit 0212) |
| 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 year-round |
| Horse and pack stock | Allowed year-round |
| 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.
Wilderness
- Greenhorn Mountain Wilderness WildernessFS · about 64% 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.
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
- WildfireAspen Acres
8 mi from the trail midpoint · 102,004 acres · 82% contained
- PrescribedBlanca Wetlands Rx
44 mi from the trail midpoint · 208 acres
Distance is to the reported incident point, not the fire edge. Closure orders are on the forest's official page.
Reference
Questions people ask
How long is the Greenhorn Trail?
8.2 miles, the sum of the 4 segments the Forest Service records under this name in Pike and San Isabel National Forests.
Source: Forest Service trail layer
What is allowed on the Greenhorn Trail?
hiking, horse and pack stock and mountain biking. The trail is closed to motor vehicles year-round.
Source: Forest Service trail layer
Where does the Greenhorn Trail start?
The line begins at 37.9213, -104.9674 and ends at 37.8939, -105.0414. 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 Greenhorn Trail in a wilderness area?
Yes. It enters Greenhorn Mountain Wilderness. Wilderness rules ban bicycles and motor vehicles and often limit group size.
Where can I camp near the Greenhorn Trail?
Spruce Group (4.7 mi) and Ponderosa Group (4.7 mi) are within five miles of the trail. Site counts and booking links are on Campsite Atlas.
Source: Campsite Atlas
How developed is the Greenhorn 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 Greenhorn Trail?
The typical grade is 12-20 percent. The typical tread is 18-24 inches wide.
Source: Forest Service trail layer
Who manages the Greenhorn Trail?
Pike and San Isabel National Forests, Forest Service unit 0212. The trail is in Colorado.
Is there a fire near the Greenhorn Trail?
2 active incidents within 50 miles of the trail midpoint as of 2026-09-18, the nearest Aspen Acres at 8 miles. Check the forest's closure orders before you go.
Source: Fire nearby
Source
This page is built from 4 segments named GREENHORN in the Forest Service TrailNFS_Publish layer, administrative unit 0212. 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.