Logan State Park is a 17-acre campground and day-use area on the north shore of Middle Thompson Lake in northwest Montana, within the 3,000-acre Thompson Chain of Lakes State Park. At 3,333 feet, the park is covered by a forest of western larch, Douglas-fir, and ponderosa pine. The campground has 37 campsites with RV hookups, flush toilets, and showers, but no tent-only sites, and the trailer and RV limit is 40 feet. A boat launch and picnic shelter are available and the park is ADA accessible. Visitors enjoy swimming, boating, water skiing, a horseshoe pit, and good fishing. The park is open year-round, 7 a.m. to 10 p.m. The A-loop of the campground is seasonal and the B-loop is open year-round.