This is Keuka Lake State Park.
By the way, this was an 85 degree day on Saturday, May 26th. It was the Saturday of Memorial Day weekend and yet the government cannot manage to have one of its best swimming holes opened. Hilariously, if one were to put a kayak into the lake and jump out I think it would be permitted. I am sure our overly litigious society is to blame, so I apologize for laying this entirely at the feet of bad government.
What has it come to when the governing authority doesn't even believe one can be responsible for one's own buoyancy…
Not sure of the significance but this is part of the story: http://www.startribune.com/politics/statelocal/159270325.html