01 reviewSelect a month, then check for open campsites
Price
$14/night
Booking
Reservable
Sites
12 campsites
Season
Year-round
Cell
Unknown
Pets
Very Pet Friendly
Select a month, then check for open campsites
Price
$14/night
Booking
Reservable
Sites
12 campsites
Season
Year-round
Cell
Unknown
Pets
Very Pet Friendly
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Learn more about alerts →Mary Island State Park
36661 CEDAR PT.STATE PK.DRIVE, CLAYTON, New York, 13624, United States
Boaters and anglers who want a real island to themselves. All 12 sites are waterfront with views across the shipping channel to Canada, and the boat-only access keeps the crowds out. Grab a rental from a Clayton marina if you don't have your own 14-footer.
No boat, no camp, that's the hard stop here. Also worth knowing: only 12 sites means availability disappears fast in summer, there are no hookups of any kind, and steep rocky terrain makes this a poor fit for anyone with mobility limitations.
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Summer delivers the most reliable conditions for Mary Island. Daytime highs run 70–85°F with nights in the mid-50s to mid-60s, ideal for paddling, fishing, and evening fires. Calm summer waters make the boat crossing from Clayton easier and safer. Expect moderate to heavy boat traffic on weekends and holidays. Fall brings cooler air and fewer bugs, though water access becomes less comfortable as temperatures drop.
Summer has the most reliable calm waters and ideal temps (70–85°F) for boating and camping.
Reservation tips, booking windows, and free cancellation alerts.
Mary Island State Park offers a range of amenities, including picnic tables, boating facilities, fishing opportunities, hot showers, a marina, and restrooms. Campsites are waterfront, providing scenic views, and there is dockage for boats. A water fill-up station is available. However, the park is only accessible by a minimum 14' motorized boat, which can be rented from nearby marinas. Accessibility to basic services and a secluded environment is emphasized.
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