Bull Mountain

Total Miles3.9
Technical Rating
3Easy
Best TimeSpring, Summer, Fall, Winter
Trail TypeFull-Width Road
Accessible By
Open Trail Map

Trail Overview

Bull Mountain is a solid pick for riders looking for a moderate off-road challenge in northern Colorado’s Routt National Forest. Best suited for ATVs, UTVs, motorcycles, and other OHVs, this multi-use forest route runs along an old logging road that climbs steadily into alpine terrain with classic Rocky Mountain views. Expect a dirt and light rock surface typical of Forest Service roads, with occasional debris and washouts after storms. The trail is open seasonally and doubles as a snowmobile route in winter, so wheeled access is limited during snowy months. Always check with the local ranger district and consult the MVUM before heading out. Located just north of North Michigan Reservoir, the trail branches near the water, offering a scenic detour for those wanting to explore more of the area.

Photos of Bull Mountain

Difficulty

This trail has steep climbs, loose gravel, and ruts ranging from 6–10 inches. Higher-clearance vehicles with 4WD or AWD are recommended for traction and clearance on uneven sections. Wet conditions can significantly increase difficulty due to reduced traction and slippery terrain.

Technical Rating

3

Status Reports

Add Status Report
SCOTT VAHEY
Sep 20, 2026
2010 Subaru Outback
Open
Muddy/WetRough/Deteriorated
Matt
Aug 13, 2026
1994 GMC Sonoma
Open
Nice trail. Couple minor steep sections or sections with loose sand and rock. Would rate a 3. Biggest issue is some wicked dirt water bars that are pretty large and may cause bellying out on lower/longer vehicles.

Bull Mountain Trail can be accessed by the following ride types:

  • Single Track
  • 50 Inch
  • 60 Inch
  • Full Width

Bull Mountain Map

The onX Offroad Difference

onX Offroad combines trail photos, descriptions, difficulty ratings, width restrictions, seasonality, and more in a user-friendly interface. Available on all devices, with offline access and full compatibility with CarPlay and Android Auto. Discover what you're missing today!

Open Trail Map