Cossatot Reefs Campground offers 31 shady campsites along Gillham Lake with modern amenities including electric hookups, hot showers, flush toilets, and a boat ramp for water access.

The campground provides an ideal base for paddling the nearby Cossatot River (a National Wild and Scenic River), with canoe access available below the dam for a 16-mile trip to Highway 71 South, plus shorter access points at Mize Crossing and Ladd Bridge.

Note that the area is subject to flooding year-round with sudden water level changes below the dam, so check conditions before visiting.