Mary Island State Park 
Ridge Ave
Wellesley Island, NY 13624
315-654-2522
https://parks.ny.gov/parks/40/details.aspx
State Park: Birding, Camp, Fish, Hike, Picnic, Walk, Water Sports
Twelve waterfront campsites are scattered throughout the park, offering seclusion and spectacular views of the Canadian shore or the shipping channel. Boats may be beached or moored near campsites. The park has a picnic area and several foot trails.