The photo was taken at Sproat Lake on Vancouver Island which is in British Columbia Canada and yes, it is a beautiful lake with lots of recreational boating and camping and many very upper end summer residences and some really great model seaplane flying as it is rarely windy there.
One of the most memorable moments for me with respect to the Mars was one evening we were sitting on the pier enjoying some refreshment and the Mars flew directly overhead at about 200' altitude. About 30 seconds later we were given a brief shower from the moisture condensation from the plane passing overhead. The plane has to be seen to be believed. If anyone is in the area tours can be arranged of the facilities and the plane(s).
Peter