Boise National Forest · Idaho

Sagehen Reservoir

4.4 mi loop · about 150 ft of climbing · 4,880 ft–4,968 ft · native material surface · trail No. 057006 · trail class 3 · typical grade trail_grade · tread 18-24 inches wide · hiking, bike

CampgroundsPicnic areasBoat launches

4,882 ft 4,880 ft · 4.1 mi high 4,968 ft

Along the way Hollywood Campground Sage Hen Creek Campground Sage Hen Dam Picnic Area Shady Pines Boat Ramp Sage Hen Creek Boat Ramp

Begins at the forest's mile 0, 44.3260, -116.1982 - no trailhead mapped Drive to where the trail begins

Sage Hen Nature Trail Trailhead the Forest Service's write-up

The Sage Hen Nature Trailhead has a picnic table, parking area and a three panel information kiosk.

Located near several campgrounds that surround Sage Hen Reservoir, including Sage Hen Creek, Cartwright Ridge, Antelope, Hollywood and Eastside Campgrounds.

This trailhead on fs.usda.gov

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About this trail's facts

The lines are the US Forest Service's National Forest System trails layer (public domain), read 2026-10-16 and simplified for the map; the length is the line's, end to end, and the class, surface, grade and tread width are the forest's own entries where it publishes them - a forest that publishes the centreline alone has none. The trailheads and the points along the way are the Service's recreation points, and the write-ups its own recarea text, unedited. Heights come from USGS 3DEP through Terrain Tiles on AWS (Mapzen/Tilezen), read along each line and rounded; a short trail on steep ground can be off by a few tens of feet. Closures change: check the forest's own site before you go.