Wellesley Island State Park

New York State Park · Jefferson County

CountyJefferson
CampingYes
Cabins / lodgeYes
Book a campsiteDirectionsOfficial NY State Parks pagePark mapWellesley Island Park MapMarina Map

About Wellesley Island State Park

The largest camping complex in the Thousand Islands, with 432 sites, a full-service marina and four boat launches. Perch, smallmouth bass, pike and muskie draw anglers; a sandy river beach handles the swimming.

Things to do

Amenities & facilities

Camping options

Hours

Park open year round.

2026 Cabin Season:

Available year-round - Cabins 5, 6, 7, 8 & 10

Cabins 1, 2, 3, 4, & 9 - 4/24 - 11/21

Cottages: Available year-round.

Registration Bldg. Hours for 2026 season:

5/1 - 6/21: 8AM to 4PM (8am to 9pm on Friday and Saturday)

6/22 - 9/6: 8AM to 9PM

9/7 - 10/11: 8AM to 4PM (8am to 9pm on Friday and Saturday)

Hours as published by NY State Parks. Check the official page before a long drive.

Facility hours

Minna Anthony Common Nature Center:

Operating Season (1st Friday in May – Columbus Day/Indigenous Peoples Day)

Monday – Thursday 9:00 a.m. – 3:00 p.m.

Friday – Sunday 9:00 a.m. – 6:00 p.m.

Off-Season (After Columbus Day/Indigenous Peoples Day)

Monday – Thursday 9:00 a.m. – 3:00 p.m.

Closed Monday and Tuesday

*Closed Christmas and Thanksgiving

2026 Swimming Season: 6/29 - 9/7, 11 am - 7 pm.

2026 Boat Dockage & Rentals: 5/1 - 10/11

2026 Camping Season: 5/1 - 10/11

Schedules for pools, museums, campgrounds, tours and other facilities inside the park, as published by NY State Parks — not the park's own opening hours.

Contact

Phone315-482-2722

Address44927 Cross Island Road, Fineview, NY 13640

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