Lac des Sapins is a beautiful, clean and accessible lake for those long, hot days when one wishes to dip into cold water. There are pedal boats available if visitors get tired of swimming and a bio-pool which is available for a fee. Picnic sites and space for doing sports are a nice addition to this charming place.
Wikipedia https://en.wikipedia.org/wiki/Lac_des_Sapins
Address 69550, France
Coordinates 46°0'24.205" N 4°22'7.8" E