Keyhole Reservoir
Lake ¡ Wyoming
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 Moorcroft-area reservoir with a swim beach at Keyhole State Park and pine hills. Keyhole's water warms nicely. A northeastern Wyoming lake swim.
Good to know
| Water type | Lake |
|---|---|
| Water temperature | 70s summer |
| Depth | designated swim beach |
| Best season | June-September |
| Fees | Wyoming State Parks day-use |
| Reservations required | No |
| Hours | sunrise-sunset |
| Parking | State park lots |
| Amenities | restrooms, picnic tables |
| County | Crook County |
| Nearest town | Moorcroft |
| Safety notes | No lifeguard at swim beach |
Map
Nearby swimming holes
Frequently asked questions
Does Keyhole Reservoir require reservations?
No reservations are required at Keyhole Reservoir based on current information â but verify before you go.
Is there a fee to visit Keyhole Reservoir?
Reported fee info: Wyoming State Parks day-use. Fees can change â confirm with the official link.
When is the best time to visit Keyhole Reservoir?
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