Willow Creek Campground is a primitive, free 9-site campground located at 3,280 feet elevation along the Middle Fork of the Boise River near Arrowrock Reservoir, accessible via a slow, winding gravel Forest Road 268 (approximately 1 hour from Highway 21).

Each site includes a picnic table and fire ring, with vault toilets available, but campers must bring their own water as no potable water is provided; the campground is closed in winter when Forest Road 268 becomes impassable due to snow.

The remote riverside location offers excellent fishing opportunities and wildlife viewing, though the challenging access road and lack of services make this best suited for self-sufficient campers seeking a secluded experience.