Tongue River Reservoir State Park Campground sits on the shores of a 12-mile-long reservoir in southeastern Montana, 23 miles north of the Wyoming border. The campground spreads across multiple areas, with Campers Point South offering paved sites and electric hookups, while other sections like Pee Wee South feature more basic dirt sites packed closer together. Most sites provide direct water access to the reservoir.
The terrain remains flat and open with minimal shade trees, making RV leveling straightforward but offering little protection from wind or sun. Janet A. found the "facilities were very clean and the area is quite flat," while several campers note the dusty conditions and bumpy gravel roads leading to some camping areas. Sites along the waterfront fill quickly during peak season, with electric hookups available at premium locations.
Fishing draws many visitors to the reservoir, though boaters should watch for submerged trees. The boat ramp provides easy water access for those launching watercraft. Cell coverage varies by carrier, with AT&T working better than Verizon according to recent visitors. Vault toilets and drinking water are available throughout the park, with a dump station for RVs.
For additional camping options in the region, campers can explore campgrounds around Sheridan. Reservations are recommended for waterfront sites with hookups, especially during summer months.
Description
Enjoy this 12-mile-long reservoir situated among scenic red shale, juniper canyons, and the open prairies of southeastern Montana. The park is loved by Montana and Wyoming anglers, campers, and boaters. It provides excellent fishing as numerous "state record" fish have been pulled from its waters.
The park offers 81 reservable camping sites with electric hookups, with 27 of those being double occupancy campsites (two electric hook-ups), as well as over 80 non-reservable, non-electric camping sites. Most sites have a fire ring and a picnic table. A dump station and water faucets are available during peak season, as weather permits. The park also has a fish cleaning station and over 20 vault toilets throughout the campgrounds. There are 2 boat ramps with docks for launching boats, one at Camper Point by the marina and one at Pee Wee North.
Day use areas include sheltered picnic tables at Campers Point and Sand Point. Sand Point has a small, but popular “beach area” for swimming and picnicking.
Warning 1 Alert is In Effect
There is 1 alert for this campground. Camp safely!
Warning 1 Alert is In Effect
There is 1 alert for this campground. Camp safely!
All watercraft entering Montana must be inspected before launch and purchase Vessel AIS Prevention pass. For more information visit Clean.Drain.Dry.
RV Road Trip Guides
Location
Public CampgroundTongue River State Park Campground is located in Montana
Directions
Located just north of the Montana-Wyoming state line, Tongue River Reservoir State Park is located 6 miles north of Decker on Secondary 314, then 1 mile east on county road.
Address
290 Campers Point, PO Box 8
Decker, MT 59025
Coordinates
45.10216329 N
106.7950774 W
Connectivity
T-MobileNo CoverageVerified by 3 usersLast on 3/21/26- VerizonNo Coverage
- AT&TNo CoverageVerified by 1 user
Connectivity
- T-MobileNo CoverageVerified by 3 usersLast on 3/21/26
- VerizonNo Coverage
- AT&TNo CoverageVerified by 1 user
Access
- Drive-InPark next to your site
- Boat-InSites accessible by watercraft.
Site Types
- Tent Sites
- RV Sites
- Standard (Tent/RV)
- Group
- Cabins
Features
For Campers
- Picnic Table
- Reservable
- Drinking Water
- Electric Hookups
- Toilets
- Alcohol
- Pets
- Fires
For Vehicles
- Sanitary Dump
- Sewer Hookups
- Water Hookups
- Pull-Through Sites
- 30 Amp Hookups
- 50 Amp Hookups
- Big Rig Friendly
Contact
General Info
Reservations
Drive Time
- 1 hr 47 min from Billings, MT
- 2 hrs 19 min from Casper, WY
- 3 hrs 35 min from Bozeman, MT
- 3 hrs 44 min from Rapid City, SD
