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We don't have current condition data for this trail. Check with the land manager before you go.

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Miller Fork, Signal Mountain, and Donner Pass Loop Trail route map
ExpertLoop
Roosevelt National Forest/Colorado

Miller Fork, Signal Mountain, and Donner Pass Loop Trail

Glen Haven, Colorado

17.8 mi

Distance

5,308 ft

Elev. Gain

8h 24m

Est. Time

Loop

Route Type

Expert

Difficulty

About This Trail

The Miller Fork, Signal Mountain, and Donner Pass Loop Trail is a challenging 17.8-mile loop located near Glen Haven in the Roosevelt National Forest. With an elevation gain of approximately 5,308 feet, this trail involves a significant ascent up to a maximum elevation of 3,434 meters. The trail features a primarily dirt surface and traverses through rugged mountainous terrain, offering experienced hikers a strenuous adventure in a remote setting.

Trail Conditions

Trail Conditions

Unknown

We have no current condition data for this trail. Check with the operator before you go, and submit a report below if you've been recently.

No recent condition reports. Be the first to share what you see on the trail.

Hazards & Warnings

steep elevation gainpotential for sudden weather changes

Elevation Profile

Min:2,267 ft
Max:3,434 ft
1,618 ft
1,618 ft
2,267 ft2,656 ft3,045 ft3,434 ft0.0 mi4.4 mi8.9 mi13.3 mi17.8 mi

Trail Details

Route Type
Loop
Surface
Dirt

Official sources & verification

Managed by United States Forest Service

Verify before you go

Managing agency

Verify by phone or mail

  • Address:CO
We display cached information from agency feeds. Hours, fees, permits, closures, fire restrictions, and conditions change without notice. Outdoors is not the permitting authority. Confirm current conditions for this trail using the links above before you go — you are responsible for compliance. Last verified by us: May 23, 2026. Our copy is more than a month old — please reconfirm with the agency before relying on it.Spot an error in our data?

Best Seasons

SpringSummerFall

Highlights

rugged mountainous terrainforest setting

Reviews

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Legacy import — verify before navigating

Path geometry came from our pre-launch legacy database. Routes have not yet been re-verified against the operator and may differ from the actual trail.

Hunt context

This trail crosses hunting units

During hunting seasons, wear blaze orange and check regulations — see the Colorado hunting page

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North Fork Big Thompson River Trail

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Bulwark Ridge Trail to Signal Mountain

Bulwark Ridge Trail to Signal Mountain

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Miller Fork Loop via Bulwark Ridge Trail

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Triangle Mountain

Triangle Mountain

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Stay nearby

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