Thompson Falls State Park is a Montana state park located near Thompson Falls, Montana. Located on the banks of the Clark Fork River in western Montana, the park is 36 acres (15 ha) in size, and includes a campground, two boat launches, a kids' fishing pond, and riverside trail. The park is fully open April 1 to November 30; walk-in day use is permitted the rest of the year.
The park features mature pine forests surrounding 17 campsites, a group use area, vault toilets, grills/fire rings, picnic tables and firewood. It is a popular area for boating, fishing, picnicking, birdwatching, and nature walks.