Great Lakes Waterway upbound direction is away from the St. Lawrence River (westerly or northerly except in Lake Michigan where upbound is southerly). Channels are marked with navigation buoys in constricted areas and pilots are required on foreign boats. Recreational boats can use or cross the ship channels, but the large boats, with limited maneuverability, have right of way. Map of the North American Great Lakes and the St. Lawrence Seaway from 1959, depicting the entire length beginning at the Gulf of Saint Lawrence in the east to the western-most terminus at Lake Superior. Great Lakes Waterway The Great Lakes Waterway is a
Four Mile Lake (Ontario) Four Mile Lake (Ontario) Four Mile Lake is a lake in the city of Kawartha Lakes in Central Ontario, Canada. The lake is northeast of Coboconk, Ontario and west of Burnt River. It is one of the Kawartha Lakes series of lakes and is in the Great Lakes Basin. Four Mile Lake is a relatively shallow warm water lake with a surface area of . The lake is located in the sub watershed of Corben Creek and has a flushing rate of approximately five years. The lake is located on the boundary between two different geological land forms. The northern