McDonald Flats Campground provides access to Green Mountain Reservoir with an old boat ramp and is located along Heeney Road near the reservoir inlet.

The campground offers 13 sites with vault toilets, picnic tables, and fire rings, though it has limited shade and open desert landscaping; sites are $23-25 per night and the campground operates seasonally from May through October.

All motorboats require mandatory Aquatic Nuisance Species inspections at Heeney Marina before launching.