Montana State Parks · Montana
Tongue River Reservoir State Park
Montana State Parks · Montana, United States
- Sites
- 164
- Hookups
- 81 electric, 83 no hookups
- Drinking water
- Yes
- Restrooms
- Yes
- Dump station
- Yes
- Pets
- Yes
- Elevation
- 3,448 ft
- Dark sky
- Bortle class 2
- Cell coverage
- T-Mobile none · AT&T none · Verizon none (carriers' 4G LTE filings to the FCC, 2025-12; not measured here)
- Address
- 292 Campers Point, Decker, MT 59025
- Phone
- 406-757-2298
About
Tongue River Reservoir State Park is a Montana FWP state park with 164 campsites (95 reservable: 81 electric, 83 non-electric), 23 vault toilets and a fish cleaning station.
Fees
Montana FWP's statewide camping rate: $4-$34 per night, depending on season and available amenities. Plus Montana's day-use entrance fee (in addition to the nightly camping rate): Montana residents who pay the $9 state parks fee with vehicle registration owe no daily entrance fee; nonresidents pay $8/vehicle or $4/walk-in per day (or $50/year for a Nonresident Entrance Pass, $35 for a 7-day pass). A 50% camping-fee discount applies statewide to Montana-resident seniors (62+), veterans and people with disabilities.
Weather, month by month
| Month | Typical high | Typical low | Coldest night | Hottest day | Years with a night below 32°F |
|---|---|---|---|---|---|
| January | 36° | 21° | -21° | 54° | 11 of 11 |
| February | 36° | 14° | -29° | 65° | 11 of 11 |
| March | 47° | 27° | 1° | 76° | 11 of 11 |
| April | 55° | 33° | -2° | 80° | 10 of 11 |
| May | 65° | 45° | 33° | 85° | 0 of 11 |
| June | 76° | 55° | 43° | 105° | 0 of 11 |
| July | 89° | 63° | 51° | 108° | 0 of 11 |
| August | 87° | 61° | 52° | 99° | 0 of 11 |
| September | 77° | 53° | 34° | 93° | 0 of 11 |
| October | 63° | 39° | 23° | 85° | 6 of 10 |
| November | 51° | 30° | -3° | 69° | 9 of 10 |
| December | 39° | 24° | 2° | 59° | 10 of 10 |
Mid-month figures from 2016–2026 of daily weather at this spot (ERA5 reanalysis via Open-Meteo, CC BY 4.0), in °F. Typical is the median; coldest and hottest are the extremes seen.
Nearby campgrounds
- Connor Battlefield State Historic Site · Wyoming State Parks · 22 mi · 20 sites
- Blacks Pond Campground · USDA Forest Service · 30 mi
- Cow Creek Campground And Picnic Area · USDA Forest Service · 30 mi
- Little Goose Campground · USDA Forest Service · 39 mi
- Sibley Lake · USDA Forest Service · 39 mi · 25 sites
All public campgrounds in Montana · Every state and province · Facts read from the operator 2026-08-25. Confirm fees, rules and current status with the operator before you go.