Lost Trail
Lost Trail is a 6.5-mile trail in Rio Grande National Forest, Colorado. The Forest Service rates it trail class 3, developed. It is open to hiking, horse and pack stock, mountain biking, motorcycle, ATV and e-bikes.
Trail conditions, closures and hazards are not tracked here. The Rio Grande 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 end | 37.7716° N, 107.3573° W · Directions ↗ |
| Other end | 37.8480° N, 107.3684° 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
| Length | 6.5 miles |
| Trail class | 3, developed |
| Type | land trail |
| Surface | native material |
| Typical grade | 8-10 percent |
| Typical tread width | 36-48 inches |
| Motor vehicles | Open to at least one motorized use |
| Accessibility | Not evaluated |
| Trail numbers | 821 |
| Forest | Rio Grande National Forest (unit 0209) |
| 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 |
| Mountain biking | Allowed year-round |
| Motorcycle | Allowed year-round |
| ATV | Allowed 05/01 to 12/01 (month/day) |
| E-bikes | 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
Lost Trailhead #821 No season published | under 0.1 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.
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
- WildfireElk
22 mi from the trail midpoint · 7,257 acres · 90% contained
- PrescribedEast Bench Piles Rx
24 mi from the trail midpoint · 5 acres
- WildfireGold Mountain
25 mi from the trail midpoint · 39,747 acres · 92% contained
- PrescribedUpd Baldy Mountain Piles Rx
28 mi from the trail midpoint · 120 acres
Distance is to the reported incident point, not the fire edge. Closure orders are on the forest's official page.
Explore
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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 Lost Trail?
The Forest Service records 6.5 miles under this name in Rio Grande National Forest, the sum of 1 segment.
Source: Forest Service trail layer
What is allowed on the Lost Trail?
Hiking, horse and pack stock, mountain biking, motorcycle, ATV and e-bikes are allowed. 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 Lost Trail start?
The line begins at 37.7716° N, 107.3573° W and ends at 37.8480° N, 107.3684° W. The nearest recorded trailhead is Lost Trailhead #821, under 0.1 miles from the line. The record does not say which end is the usual start.
Source: Forest Service trail layer
Is the Lost 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 Lost Trail?
Mill Creek Campground (4.3 mi) is within five miles of the trail. The camping section lists it with site counts and booking links.
Source: Campsite Atlas
How developed is the Lost 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 Lost Trail?
The typical grade is 8-10 percent. The typical tread is 36-48 inches wide.
Source: Forest Service trail layer
Who manages the Lost Trail?
Rio Grande National Forest, Forest Service unit 0209. The trail is in Colorado.
Is there a fire near the Lost Trail?
The interagency feed shows 4 active incidents within 50 miles of the trail midpoint as of 2026-11-01, the nearest Elk at 22 miles. Check the forest's closure orders before you go.
Source: Fire nearby
Source
This page is built from 1 segment named Lost Trail in the Forest Service TrailNFS_Publish layer, administrative unit 0209. 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.