Mostly a ridge trail that alternates between subalpine forest and above timberline zones. The trail elevation varies as it passes two lakes and crosses two passes before descending to the Pasayten River. There is limited parking at the trailhead.
Directions: From Winthrop drive State Route 20 fourteen miles to Mazama junction. Turn right to Mazama then left onto Okanogan County Road 9140 to where it joins Forest Service Road 5400 (Hart's Pass Road). Drive 18.5 miles to Hart's Pass and turn right towards Slate Peak. The trailhead is at the second switchback beyond the horse loading area.
See additional information under Backpacking and Horse Riding.
The trail route is mostly above timberline and offers many views. For those seeking solitude the trail is generally not used much past Silver Lake. At about 0.5 mile there is a cut-off trail to the Robinson Creek-Middle Fork Trail 478, making loop trips possible via both the Middle Fork and West Fork drainages.
Horse Riding & Camping
This trail should be considered more difficult for the stock user. While it is not impassable to stock, it is not a trail for the inexperienced horse or rider. There are sections of narrow tread with steep exposure and steep rocky stretches.