Tongue River Reservoir State Park2 min read

This week’s focus takes us to the southeast border of Montana and 10 minutes outside of Decker, MT to Tongue River Reservoir State Park.

Tongue River Reservoir is on the Tongue River, a tributary of the Yellowstone River, approximately 265 miles long, that runs through Montana and Wyoming. The park provides a 12-mile long reservoir set in the truly scenic prairie land of southeastern Montana featuring red shale and juniper canyons.

Due to the rareness of large bodies of water like this in prairie country, the park can see up to 50,000 visitors a year.

Camping? Tongue River Reservoir has 81 reservable campsites with electric hookups, and 27 of those are double occupancy with two electric hook-ups.

There are also 80 non-reservable, non-electric sites! Most sites also have a fire ring and picnic table.

There is an RV dump station and water faucets available during peak season. During the offseason there are 11 sites with electricity, these are first-come, first-served.

Did you know?

Although there are no hiking opportunities at Tongue River, there is hiking available nearby at Rosebud Battlefield State Park or Little Big Horn Battlefield National Monument.

Things to do:

✅ Take the boat out on the water! There are two boat ramps with docks, one at Campers Point and one at Pee Wee North.

✅ Go for a swim! Sand Point has a small beach area for swimming.

✅ Keep your eyes open for wildlife! You may just see osprey, blue herons, deer, antelope, or bald eagles.

✅ Bring your picnic! The designated day-use area has picnic tables at Campers Point and Sand Point.

✅ Plus so many more!

At 12 miles long, the reservoir makes for excellent fishing any time of year! You’ll find crappie, walleye, bass, and northern pike here. You can also fly fish below the dam and there is a fish cleaning station located within the park.

Forgot anything or just need additional supplies? The marina at Campers Point has firewood, ice, fishing and boating supplies, boat rentals, boat and RV storage, bait, groceries, snacks, drinks, gasoline, souvenirs, fishing, and hunting licenses, and non-resident park passes.

While summertime may be the most popular time to visit the park, Tongue River Reservoir State Park also features amazing ice fishing and year-round campsites that support just that.


Four state record fish have been pulled from Tongue River Reservoir State Park, including a 37 pound Northern Pike?

Tongue River Reservoir
State Park
Quick Facts

Open Year-Round

Open Year-Round
11 campsites have electricity year-round

290 Campers Point
Decker, MT 59025

Open Year-Round 

  • 642 Acres

  • ADA Accessible

  • Pets Allowed

  • Toilets (Vault)

  • Water

  • Electricity

  • RV Dump Station

  • Boat Launch

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