Stillwater Trailhead

Area Status: Unreachable
East Fork trail

6/13/2024: Trailhead is reachable, however trails remain 70% under snow still with drifts in areas that receive little sunlight. Generally melted out by Early to Mid-July.

The Stillwater Trail head offers hikes into the Flat Tops Wilderness and passes Little Causeway Lake at 1.0 mile. The trail then quickly climbs and reaches the top of the Bear River/Williams Fork Divide at 2.3 miles. Here is where a primitive trail splits off and ascends to the Devil's Causeway.

The East Fork Trail then switchbacks down into the Williams Fork drainage to reach Causeway Lake at 5.7 miles. At mile 7 is Round Lake and the junction with the Lost Lakes Trail No. 1116 which accesses the West Lost Lake Trail No. 1103. The trail then continues downstream and reaches the junction with the Black Mountain Creek Trail No. 1117 at mile 8.9. The trail comes to a crossing of the East Fork Williams Fork River at 10.5 miles and the Northern junction with the Lost Lakes Trail No. 1116 shortly after. This crossing is often impassible during spring runoff. At 13 miles is the junction with the Transfer Trail No. 1172. The trail continues, leaving the Wilderness, down past the Pyramid Guard Station and meets the East Fork Trailhead.

Bear River Trail No. 1120 – This 3.3 mile trail begins at the registration/information board off the East Fork Trail. The trail follows the Bear River up into the Flat Tops Wilderness and reaches Mosquito Lake at 1.5 miles. The trail then climbs before reaching 11,400 feet and ends at the junction with the Little Trappers Lake Trail No. 1814 and the Chinese Wall Trail No. 1803.

North Derby Trail No. 1122 – This 2.2 mile trail crosses the Stillwater Dam and enters the Flat Tops Wilderness. After passing some ponds, the trail begins to quickly ascend towards the ridge. At 11,200 feet the trail ends at the junction with the Edge Lake Trail No. 1879 and the Hooper Lake Trail No. 1860. The Hooper Lake Trail gives access to Hooper and Keener Lakes.

There is no camping allowed within ¼ mile of Hooper and Keener Lakes.

No camping or campfires within 100ft of all streams, lakes, and trails.

The alpine vegetation in the Flat Tops is very fragile, PLEASE do not take short cuts and stay on the trail as this causes more resource damage.


At a Glance

Current Conditions: Open seasonally, typically June-November. For up to date conditions, contact the Yampa Ranger District. 
Fees: Free, donations are accepted at Trailhead.
Permit Info: Please fill out Wilderness Registration sheet at Trailhead.
Restrictions: Wilderness Information and Regulations
Closest Towns: Yampa, CO
Water: No
Restroom: Yes
Information Center: Yampa Ranger District
(970) 638-4516
300 Roselawn Ave
Yampa, CO 80483

General Information


From Yampa, follow County Road 7 southwest for 6.5 miles following signs to Yamcolo and Stillwater Reservoir. The road will turn into gravel at 6.5 miles where it becomes Forest Service Road 900. Continue another 10 miles on FSRD 900 until the road dead ends at the Trailhead. 

Recreation Map

Map showing recreational areas. Map Information


Lake and Pond Fishing

River and Stream Fishing

Day Hiking


Horse Camping

Horse Riding

Big Game Hunting

Viewing Scenery

Recreation Areas

Recreation Activities


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