That's a lake, but not the one we used to go to. We went to Eagle Lake in Tichborne. (Population: 100 in winter and 300 in summer.) The closest "town" was Sharbot Lake. (Big enough for a laundromat AND a Chinese-Canadian restaurant.) The closest city was an hour away -- Kingston. Which part of Southern ON is this lake/your memories?
Old Fort Henry, The Thousand Islands, Upper Canada Villiage, Bon Echo Provincial Park, the Rideau Canal System and so many more cool places in Southern Ontario!