Overview
Knife Ridge Trail climbs to one of the most dramatic vantage points in Clearwater National Forest, an exposed ridgeline with views spanning the Clearwater Mountains, the Bitterroot Range, and the great drainages of north-central Idaho. The 9.0-mile out-and-back gains 2,600 feet and is considered strenuous, with the upper ridge section presenting genuine exposure.
The trail is one of the more remote in the Clearwater forest, and visitor traffic is minimal even in peak summer. This is a trail for hikers comfortable with elevation, exposure, and route-finding on a partially faint upper trail.
The Canyon Creek Trail provides a shorter and slightly less exposed summit alternative in the same area.
The Route
The trail begins in conifer forest and climbs steadily through mixed terrain. The first three miles gain most of the elevation through switchbacks. The upper section emerges onto the ridge proper, which narrows in places. The summit view point at trail's end is a broad platform with views in all directions.
When to Visit
July through September. The exposed upper ridge can be dangerous in lightning storms; start early and be off the ridge by early afternoon in unsettled weather. Snow can persist on the ridge into early July.
Practical Details
No facilities at the trailhead. Carry all water; no reliable sources on the route. Navigation tools are important on the upper ridge. The 10 Essentials are essential.
Getting There
From the US-12 corridor, follow forest roads south into the Clearwater National Forest interior. High-clearance vehicle required. Contact the Clearwater Ranger District for current road access information.
Leave No Trace
This trail receives enough use that following Leave No Trace principles is important for preserving the experience for future visitors. Stay on the marked trail to prevent erosion. Pack out all waste. Avoid camping within 200 feet of water sources or the trail. Use existing fire rings only where campfires are permitted, and check current fire restrictions at checking conditions before you go before any visit. The trail and surrounding terrain remain in good condition because previous visitors have respected these norms.
Safety Considerations
The strenuous rating reflects the trail's general character under typical conditions. Weather, seasonal snow, and trail conditions can change the experience significantly. Carry the 10 Essentials on any full-day outing. Inform someone of your plans and expected return time before heading out, particularly on longer or more remote trails. Cell service varies throughout Clearwater National Forest and may be unreliable in canyon bottoms or remote terrain.