Montana State Parks · Montana
Lake Mary Ronan State Park
Montana State Parks · Montana, United States
- Sites
- 25
- Season
- May 1 to October 30
- Drinking water
- Yes
- Restrooms
- Yes
- Pets
- Yes
- Elevation
- 3,812 ft
- Dark sky
- Bortle class 1
- Cell coverage
- T-Mobile none · AT&T none · Verizon none (carriers' 4G LTE filings to the FCC, 2025-12; not measured here)
- Address
- 50623 Lake Mary Ronan Rd, Dayton, MT 59860
- Phone
- 406-849-5082
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
Lake Mary Ronan State Park is a Montana FWP state park with 25 campsites, some with seasonal electricity.
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 | 33° | 22° | -17° | 40° | 11 of 11 |
| February | 32° | 19° | -13° | 46° | 11 of 11 |
| March | 41° | 26° | 2° | 58° | 11 of 11 |
| April | 46° | 30° | 8° | 71° | 10 of 11 |
| May | 58° | 39° | 31° | 80° | 2 of 11 |
| June | 68° | 47° | 36° | 84° | 0 of 11 |
| July | 82° | 57° | 46° | 94° | 0 of 11 |
| August | 81° | 58° | 47° | 96° | 0 of 11 |
| September | 69° | 51° | 40° | 84° | 0 of 11 |
| October | 54° | 38° | 30° | 73° | 3 of 10 |
| November | 40° | 31° | 12° | 56° | 9 of 10 |
| December | 34° | 28° | 6° | 46° | 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
- Big Arm State Park · Montana State Parks · 9 mi · 41 sites
- West Shore State Park · Montana State Parks · 9 mi · 33 sites
- Wayfarers State Park · Montana State Parks · 17 mi · 30 sites
- Yellow Bay State Park · Montana State Parks · 17 mi · 5 sites
- Blue Bay Campground · Tribal Lands · 18 mi · 22 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.