Williams Valley Trails - 80A - 80F


The Williams Valley Trail System consists of a number of interconnected loops, some of which are groomed for winter cross-country skiing, with others suitable for un-groomed backcountry skiing. During the spring, summer and fall, all are suitable for mountain biking, hiking, and horseback riding.  The Williams Valley Recreation Area is closed to all motorized use year round. There is a snowmobile trailhead for winter access just beyond the boundary to the non-motorized area.

There are four trailheads to access the trail system – three along FR 249, and one at the junction of FR 249 and FR 276.  The Williams Valley trails are rated according to difficulty: Easiest, More Difficult, and Most Difficult.

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Easiest Trails:

The Valley Trail (# 80A) is 2.8 miles long. It begins at Forest Service Road 249 and ends at a junction with the Sidewinder Trail (# 80G) at its east end. For winter use, the trail is groomed for interconnecting loops within the meadow.

The Lookout Meadow Loop Trail (# 80E) is 1.3 miles long. It begins at a junction with Valle Trail (# 80A) and ends looping back to (# 80A).

More Difficult Trails:

The Isolation Trail (# 80B) is 2.1 miles long. It begins at a junction with Valley Trail (# 80A) and ends at a junction of Yahoo Trail (# 80D) and Half Moon Trail (# 80C).

The Sidewinder trail (# 80G) is 0.9 miles long. It begins at Toboggan Trailhead and ends at a junction with Valley Trail (# 80A) at its west end.

The Half-Moon trail loops from the Lookout Meadow Loop (# 80E), past the junction with the east end of the Yahoo Trail (# 80D) around to the junction with Isolation Trail (# 80B) and the west end of #80D.

Most Difficult Trails:

Yahoo Trail (# 80D) is only .10 mile in length, but steep, and joins Half Moon Trail to the east, with a junction between Isolation Trail and Half Moon Trail to the West.

Up and Over Trail (# 80F) joins Lookout Meadow (# 80E) to the east with Isolation Trail (# 80B) to the west.

At a Glance

Usage: Light
Restrictions: Motorized cross-country and trail travel is prohibited - there is a snowmobile trailhead outside the non-motorized area boundary for motorized winter recreation
Water: No
Restroom: No
Operated By: Forest Service

Recreation Map

Map showing recreational areas. Map Information



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Horse Riding & Camping

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Winter Sports

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XC Skiing/Snowshoeing


Because of the variety of terrain and conditions, both novice and more experienced skiers will find plenty to enjoy here. Slopes are moderate to gentle and turns are gradual on most of the ski trails, which wind through trees and across open meadows. Powder conditions persist through most of the winter, during which 20 kilometers of trails are maintained for both striding and skate skiing by the Alpine Ranger District. As early spring comes (usually late March), the snow tends to form a hard crust, making off-trail exploring very appealing. The whole area becomes a giant cross-country ski/skating rink, and you are free to fly across the meadows.

Areas & Activities


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