Dow's Lake in Ottawa, Canada is a small man-made lake on the Rideau Canal, situated two kilometres north of Hog's Back Falls in the middle of Ottawa. It is at the south end of Preston Street, just south of Carling Avenue, and just to the west of Bronson Avenue. At the south end of the lake is Carleton University, and to the west is the Dominion Arboretum, at the edge of the Central Experimental Farm.