Bighorn Canyon (Bighorn Lake)
Lake ¡ Montana
âšī¸ Community-reported spot. Details below are compiled from public sources and are reported to be accurate â always verify locally before visiting.
About this swimming hole
A Fort Smith-area reservoir with shoreline swimming and Bighorn Canyon views. Bighorn Lake's water warms nicely. A dramatic canyon lake swim.
Good to know
| Water type | Lake |
|---|---|
| Water temperature | 70s summer |
| Depth | swim near shore |
| Best season | June-September |
| Fees | NPS; America the Beautiful pass |
| Reservations required | No |
| Hours | sunrise-sunset |
| Parking | NRA lots |
| Amenities | restrooms, picnic tables |
| County | Big Horn County |
| Nearest town | Fort Smith |
| Safety notes | No lifeguard |
Map
Nearby swimming holes
Frequently asked questions
Does Bighorn Canyon (Bighorn Lake) require reservations?
No reservations are required at Bighorn Canyon (Bighorn Lake) based on current information â but verify before you go.
Is there a fee to visit Bighorn Canyon (Bighorn Lake)?
Reported fee info: NPS; America the Beautiful pass. Fees can change â confirm with the official link.
When is the best time to visit Bighorn Canyon (Bighorn Lake)?
The best season is typically June-September.
â ī¸ Verify before you go. Conditions, fees, reservations, and access can change â confirm details with the official link before visiting. Last verified: September 2026