Marcus Island Campground offers 25 reservation-only sites nestled in a heavily shaded evergreen forest on Lake Roosevelt's shore, with a small boat launch and parking area available before the campground entrance.

The single-lane winding access road leads to spacious, well-spaced campsites suitable for RVs and tents, featuring fire rings, picnic tables, and vault toilets, though no potable water or hookups are available.

This popular destination for fishing and boating is open seasonally (April-October) at $23/night and is best accessed via Highway 25 north of Kettle Falls, WA.