Cartwright Ridge Campground sits on the north shore of Sage Hen Reservoir at 4,800 feet elevation in the Boise National Forest, featuring a boat ramp and dock for motorized and non-motorized boating access.

The campground offers restroom facilities and shaded sites among Ponderosa pine and fir trees, with the scenic 4-mile Sage Hen Reservoir Trail nearby for hiking and wildlife viewing.

Open mid-May through September, the campground is accessed via Forest Service roads from Ola, Idaho, approximately 45 miles northeast of Boise.