Sylvan Lake
Lake · South Dakota
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
Sylvan Lake's granite-ringed waters in Custer State Park are one of the Black Hills' most photographed swims. Swimming is permitted in the clear mountain lake beneath the Cathedral Spires. Hikers on the Sunday Gulch and Sylvan Lake Shore trails cool off here all summer.
Good to know
| Water type | Lake |
|---|---|
| Water temperature | 60s |
| Depth | lake swimming |
| Best season | June-August |
| Fees | Custer State Park entrance fee |
| Reservations required | No |
| Parking | state park lots |
| Amenities | swim areas, hiking trails, rock climbing |
| County | Custer County |
| Nearest town | Custer |
| Safety notes | no lifeguard; cold mountain water |
Map
Nearby swimming holes
Frequently asked questions
Does Sylvan Lake require reservations?
No reservations are required at Sylvan Lake based on current information — but verify before you go.
Is there a fee to visit Sylvan Lake?
Reported fee info: Custer State Park entrance fee. Fees can change — confirm with the official link.
When is the best time to visit Sylvan Lake?
The best season is typically June-August.
⚠️ Verify before you go. Conditions, fees, reservations, and access can change — confirm details with the official link before visiting. Last verified: September 2026