East Fork Trail

This seasonal trail is generally not melted off until late June/early July due to snow levels at this elevation.

This Trailhead serves as an access point for the East Fork Trail No. 1119 and the Flat Tops Wilderness . It is also the closest access point for the Lost Lakes Trail No. 1116 and West Lost Lake Trail No. 1103.

East Fork Trail No. 1119 – This 15.7 mile trail is very popular during summer months as it provides the most direct access to the Devils Causeway and Lost Lakes. This trail can also be accessed from the South at the Stillwater Trailhead .

The trail begins across the road just below the historic Pyramid Guard Station, constructed by the Civilian Conservation Corps in 1934. The trail starts to climb up the East Fork Williams Fork River drainage and meets the Transfer Trail No. 1172, connecting to the Transfer Trailhead , at mile 2.5. At 4.0 miles is the Northern junction with the Lost Lakes Trail No. 1116. The trail then drops down to a crossing of the East Fork Williams Fork River. This crossing is often impassible during spring runoff. Continuing upriver the trail meets the Black Mountain Trail No. 1117 at 6.5 miles. Several old game trails diverge along this section. To stay on the main trail, follow the rock cairns. After 8.3 miles the trail reaches Round Lake and the Southern junction with the Lost Lakes Trail No. 1116.

The trail continues up the valley and passes by Causeway Lake at 9.5 miles. The next 2.5 miles the trail begins to ascend out of the valley to an elevation of 11,600 ft and the top of the Bear River/Williams Fork Divide. Here is where a primitive trail splits off and ascends to the Devils Causeway . The main trail then switchbacks down to Little Causeway Lake and continues to the Stillwater Trailhead.

Lost Lakes Trail No. 1116 – This 6.4 mile trail begins and ends along the East fork Trail No. 1119. This trail follows the West Fork Williams Fork River on its Northern leg through area burned in the Lost Lakes Fire of 2002. The Southern portion of the trail gives access to Round Lake, East Lost Lake, and Round lake. At the midway point is the Junction with the West Lost Lake Trail No. 1103.

West Lost Lake Trail No. 1103 – This 1.5 mile trail is accessed off the Lost lakes Trail No. 1116. The trail gives access to Deep lake and West Lost Lake before climbing up the ridge to meet the Chinese Wall Trail No. 1803 .

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 as this causes more resource damage.