Same lake (although you'll notice that a couple of the swimmers are more obviously female). But on the back, this card says:
This body of water is not included on any map of Franklin Township. It existed only in the notions case at the New Philadelphia general store operated by the McClellan/Wiggs/DeJean family (and now part of the collection of buildings at the Stevens Museum). This card was published by the NYCE Co., which seems to have been a subsidiary of Tichnor Bros. that specialized in locals. Here are some more New Philadelphia NYCE locals: