Lake Joseph is located to the west of Lake Rosseau in the central area of Muskoka. Like Lake Rosseau, Lake Joseph also extends into Seguin Township in Parry Sound District. Access may be gained to Lake Joseph via Hwy #69 and #632 as well as Muskoka Roads #7 and #169. Lake Joseph drains into Lake Rosseau by way of the Joseph River and also via the Port Sandfield “cut” located at Cox Bay.
Source: Muskoka Water Web