Mary Island State Park

New York State Park · Jefferson County

CountyJefferson
CampingYes
Book a campsiteDirectionsOfficial NY State Parks page

About Mary Island State Park

Twelve heavily wooded acres reachable only by boat, with steep rocky outcrops looking out to the Canadian shore and the shipping channel. Boats moor or beach beside the campsites; foot trails cross the rest.

Things to do

Amenities & facilities

Camping options

Entrance fee

Vehicle Entry: Day Use $6 Toll Booth Hours: 8:30AM to 3:30PM Know Before You Go Pet Policy A maximum of two pets are allowed in campsites and day use areas unless prohibited by sign or directive. Pets are to be supervised at all times and either be crated or on a leash not more than 6-feet in length. Proof of rabies inoculation shall be produced if requested by staff. Pets are not permitted in playgrounds, buildings, golf courses, boardwalks, pools and spray-grounds or guarded beaches (this does not apply to service animals).

Hours

Open from Memorial Day weekend to Labor Day.

2026 Camping Season: 5/22 - 9/6

2026 Boat Dockage Season: 5/22 - 9/6

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

Contact

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