Boulder River (Montana)
River · Montana
ℹ️ Community-reported spot. Details below are compiled from public sources and are reported to be accurate — always verify locally before visiting.
About this swimming hole
The Boulder River's valley pools near Big Timber, with Absaroka views and clear water. The river runs cold and the setting is scenic. A Sweet Grass County swim.
Good to know
| Water type | River |
|---|---|
| Water temperature | cold |
| Depth | wading to ~5 ft |
| Best season | June-September |
| Fees | Free |
| Reservations required | No |
| Hours | sunrise-sunset |
| Parking | Fishing access lots |
| County | Sweet Grass County |
| Nearest town | Big Timber |
| Safety notes | No lifeguard |
Map
Nearby swimming holes
Frequently asked questions
Does Boulder River (Montana) require reservations?
No reservations are required at Boulder River (Montana) based on current information — but verify before you go.
Is there a fee to visit Boulder River (Montana)?
Reported fee info: Free. Fees can change — confirm with the official link.
When is the best time to visit Boulder River (Montana)?
The best season is typically June-September.
⚠️ Verify before you go. Conditions, fees, reservations, and access can change — confirm details with the official link before visiting. Last verified: September 2026