Tongue River Reservoir State Park is nestled in the scenic red shale and juniper canyons of southeastern Montana, near Decker. The park features a 12-mile-long reservoir, offering a rare large body of water in this prairie landscape, attracting about 50,000 visitors annually. It provides a serene backdrop for boating, fishing, and wildlife viewing. The park is open year-round, allowing for both summer and winter activities like swimming and ice fishing. The area is rich in wildlife, with frequent sightings of osprey, blue herons, deer, antelope, and bald eagles.
The Tongue River, a 265-mile tributary of the Yellowstone River, flows through the park, creating a picturesque setting. The park's elevation is 3,468 feet, and it spans 642 acres. Visitors can enjoy camping at one of the many campsites, with options ranging from electric hookups to non-electric sites. The park also features picnic areas, a marina, and a fish cleaning station.
Overall, Tongue River Reservoir State Park offers a unique blend of natural beauty and recreational opportunities, making it a popular destination for outdoor enthusiasts.