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Status: Open through Sun Sep 06 2015   Season Dates
Max reservation window: Sun Apr 03 2016   Later Dates
11 site(s) found
ALL (11)


Take the Virtual Tour! - MARY ISLAND STATE PARK

Mary Island State Park comprises 12 heavily-wooded acres with steep rocky outcroppings. 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.


Mary Island State Park is located east of Wellesley Island.


Boating, fishing, camping and picnicking are the peaceful activities available at the park.


Campsites, picnic tables, and boat dockage are the main features of the park.

Nearby Attractions:

Nearby state parks include Canoe-Picnic Point State Park, Cedar Island State Park, Wellesley Island State Park, Dewolf Point State Park, and Keewaydin State Park.

Services & Amenities:

Within Facility
  • Boating
  • Comfort Station
  • Fishing
  • Marina
  • Picnic Tables
  • Picnicking
  • Water Fillup Station
Within 10 Miles
  • Golfing
  • Hospital
  • Powerboating
  • Shopping
Alerts and Important Information

To insure fairness for all NY customers, any reservation with departure dates outside the 9-month Maximum Window can not be changed or cancelled until 18 days after the reservation was made.

The only way to get to the park is by boat, there are no bridges or ferries. Patrons must have at least a 14' motorized boat to access Mary Island. Boaters are instructed to launch from Keewaydin State Park. Motor boats can be rented at Keewaydin State Park Marina. Boat rentals are available at Wellesley Island State Park Marina 315-482-6503.

  • This Park operates under a 2-day window for advance reservations.
  • Patron must be 18 or older to register for a site.
  • Only 2 pets per site are permitted. Current rabies certificate required. Pets must be on a leash no longer than 6ft at all times.
  • Looking to reserve for just 1-night? If you make your reservation within 3 days of your arrival you can book a 1-night stay online or through the Call Center. This applies only to campsites.
  • Peak season: During peak season, a camping party and their equipment may occupy a site for a maximum of 14 continuous days. After which, the camping party and equipment must leave the site and facility for 2 days before registering again for another site.
  • IMPORTANT: New York State Parks encourages everyone to be safe outdoors. Please take a few moments to read about the health risks associated with tick bites and some simple steps you can take to safeguard you and your family. http://www.governor.ny.gov/press/04092014Ticks

    Getting There:

    GPS Info. (Latitude, Longitude):
    44.36583, -75.92139
    44°21'57"N, 75°55'17"W

    Mary Island is located to the east of Wellesley Island, with only a narrow channel separating them. Access is by boat only, from either Grass Point State Park (4 miles over water), or Keewaydin State Park, which is 2 miles from the island. Patrons must have at least a 14' motorized boat to access Mary Island. Boaters are instructed to launch from Keewaydin State Park. Motor boats can be rented at Keewaydin State Park marina. 315-482-9381

    Contact Information:

    Mailing Address:

    CLAYTON  NY  13624

    Phone Number:

    Information:  (315)482-9381