Sandbanks Provincial Park is a provincial park located on Lake Ontario in Prince Edward County near Picton, Ontario, Canada. The park is considered one of the best sandy beaches in Ontario and contains the largest bay-mouth barrier dune formation in the world. The 1,550.87-hectare park was established in 1970 and operates year round. Birdwatching, camping, cycling, fishing, and swimming are among the activities available in the park.