Montana State Parks · Montana
Tongue River Reservoir State Park
Montana State Parks · Montana, United States
- Sites
- 164
- Hookups
- 81 electric, 83 no hookups
- Season
- Year-round
- 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
Site map
The imagery of the campground. Press and hold the map to drop your own pins and notes; the operator publishes no site points here. Your ratings, notes, pins and photos are kept with the campground on your Saved list, the same list the camping map and the drive page keep.
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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.