Great Mountain Lake is located in Killarney Provincial Park.
{"id":1621,"name":"Great Mountain Lake","type":"waterbody","subtype":"Lake","cover":null,"google_id":"ChIJv2umRy5qLk0RdmH5v8_ymtk","lat":46.1572327,"lng":-81.3608514,"routes":[],"readonly":1,"moderation_wanted":0,"description":"","attributes":{},"fields":[],"state":"public","pics":null,"picsInfo":[],"rels":[{"id":18,"lat":46.0130472,"lng":-81.4017498,"name":"Killarney","type":"toponym","subtype":"Provincial Park"}],"availability":{"calendar":null,"lastUpdateDate":null},"reviews":[]}