Big Sandy Bay is currently closed by the municipality: https://www.kflaph.ca/en/healthy-living/public-beach-listings.aspx
Big Sandy Bay is one of the great beaches of Lake Ontario. Located on Wolfe Island, it is a ferry ride away from Kingston (Ontario) or Cape Vincent (New York State). The Bay is part of an environmentally significant dune and wetland complex. It is only open to the general public for swimming June - September. Visitors coming to the island from Kingston are strongly encouraged to leave their cars on the mainland and bike to the beach from the ferry terminal. To get to the bay, take Highway 95 to Reed's Bay Road to 3rd Line Road. Park in the lot or lock your bikes at the gatehouse. The 1.3-kilometre nature trail takes you to the beach. There is a $15 park entrance fee for adults, with discounts for bikes, families, children, and frequent visitors.