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Stillwater Pass

Saturday, June 15, 2024

Other Names

Grand Lake Trail System, Idleglen Trailhead, Supply Creek Trailhead, Gravel Mountain, Arapaho National Forest, Roosevelt National Forest, Sulphur Ranger District

Last Known StatusOpen

The Stillwater Pass and Grand Lake trail systems can be accessed at the Idleglen and Supply Creek Trailheads. The trails gets heavy traffic so expect weekends to be busy. The trail access is free and open to mountainbikes, OHVs and snowmobiles when the proper conditions are met.

Restrooms and a kiosk are provided at the trailhead and snowmobile and OHV rentals are located at nearby Grand Lake and Granby. Vehicles must display state registration or a non-resident Colorado OHV sticker. Vault toilets and parking can be found at the trailhead.

Trail Map... Nearby ATV Trails...


Permit RequiredYesColorado OHV Sticker
Dates OpenJune 15 - November 15
Other ATV Stickers AcceptedNoColorado Non-Resident OHV permit required.
Spark ArrestorYesA spark arresting exhaust silencer or end cap is required for all vehicles.
Noise LimitYes (96 dB)(1998/older limit 99 dB, 1998/newer limit 96 dB)
Whip FlagsNot Required
Maximum Vehicle WidthNo Restriction
Allow Dirt Bikes, Trail Bikes and Motorcycles Motorcycles & Dirt BikesPermitted
Allow All Terrain Vehicles / Quads / Four Wheelers ATVsPermitted
Allow Utility Terrain Vehicles, Side by Sides (SXS), RZR UTV & SXSPermitted
Allow 4x4 Jeeps, SUVs and 4 x 4 Trucks with License Plates 4x4 & Jeeps (registered)Permitted
Dune Buggy & Sand Rail
4x4 (unregistered)
2 Stroke EnginesNo Restriction
Camping / Overnight RV Parking CampingSome Areas(camp in developed sites only)
Campfire Restrictions CampfiresSome Areas(permitted in developed campsites only)
watch for restrictions and check with the forest service
Night RidingUnknown
Trail BlazingProhibitedstay on trails
Rule EnforcementYesDedicated Rangers/Officers
Jeep/SUV Patrol
Park rangers drive around all the time checking for OHV stickers


Approx Size32,000 acres (50 sq mi)
Miles Of Trail130
Climate TypeForest
Elevation8000 to 10000 ft.
Trail MaintenanceMarked, Not Rated, Lightly Maintained
Loose DirtThis trail has some loose dirt.Some
Hard PackThe trail has some hard pack terrain.Some
SandThis trail has no sandy areas.None
DustThe trail has little dust on typical days.Little
TreesThe trail has almost all trees.All
Steep HillsThis trail has some steep hills.Some
Single TrackThis national forest has some single track trails.Some
HazardsThis trail has few hazards.Few(hazards assumed marked but use caution)
Easy Terrain NoviceThis trail has some beginner terrain.Some
Moderate Terrain AmateurThis trail has mostly intermediate level terrain.Mostly
Difficult Terrain ExpertThis trail has little expert terrain.Little


AreaMotorized Trails
LandNational Forest


Gasoline GasolineGrand Lake, CO
Diesel DieselGrand Lake, CO
Potable Water Water1-5 Miles (NE)Elk Creek Campground (970) 627-8502
RV Hookups RV Hookup1-5 Miles (NE)Elk Creek Campground (970) 627-8502
RV Dump Station RV Disposal1-5 Miles (NE)Elk Creek Campground (970) 627-8502
Primitive Camping Campground5-20 Miles (S)Stillwater Campground (970) 887-4100
Convenience Store Conv StoreGrand Lake, CO




Our RatingRatingGood
Recommended StayFull Day
Comments(Scroll Down For Rider Reviews & Comments)


Nearest CityGrand Lake, CO
Go Back To Colorado List
Trail MapGo To Trail Map
From: Granby, CO
1) Take US-34 north about 9 miles
2) Turn left (west) on County Road 4, continue 4.5 miles
3) Staging area is on the left.


Contact InfoArapaho And Roosevelt National Forests - Sulphur Ranger District
2150 Centre Avenue, Building E
Fort Collins, CO 80526
(970) 887-4100
Contact InfoColorado State Parks - Registration Unit
13787 South Highway 85
Littleton, CO 80125
(303) 791-1920
CommentColorado OHV Registration Info
Contact InfoOn the Trail Rentals
1447 County Road 491
Grand Lake, CO 80447
(970) 627-0171
(970) 627-8866
CommentATV and snowmobile rentals
Contact InfoSpirit Lake Rentals
10438 US HWY 34
Grand Lake, CO 80447
(970) 627-9288
CommentATV and UTV Rentals plus full service Polaris dealership.
Contact InfoAbove And Beyond 4x4 Guides
(970) 390-5337
CommentATV and 4x4 Tours


Stillwater Pass Trail Photo

Stillwater Pass Trail

Photo Submitted 1/28/2013 (Thanks!)

Stillwater Pass Trail Photo

Stillwater Pass Trail

Photo Submitted 10/7/2014 (Thanks!)

Stillwater Pass Trail Photo

Stillwater Pass Trail

Photo Submitted 10/7/2014 (Thanks!)

Stillwater Pass Trail Photo

Stillwater Pass Trail

Photo Submitted 5/18/2017 (Thanks!)

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