Wellesley Island State Park
River · New York
About this swimming hole
Wellesley Island State Park has an official state-parks-listed sandy river beach for swimming on the St. Lawrence River. The Thousand Islands park offers the river beach plus a marina, campground, and nature trails. It is the region’s premier public river swim.
Good to know
| Water type | River |
|---|---|
| Best season | June-September |
| Fees | $8 parking |
| Reservations required | No |
| Parking | Park lots |
| Amenities | restrooms, lifeguards, picnic tables, campground, boat launch |
| County | Jefferson County |
| Nearest town | Fineview |
| Safety notes | River swim; use designated beach area |
Map
Official information
Official park / agency page ↗ — check current conditions, fees, and reservations here before you go.
Nearby swimming holes
Frequently asked questions
Does Wellesley Island State Park require reservations?
No reservations are required at Wellesley Island State Park based on current information — but verify before you go.
Is there a fee to visit Wellesley Island State Park?
Reported fee info: $8 parking. Fees can change — confirm with the official link.
When is the best time to visit Wellesley Island State Park?
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