Great Lakes Circle Tour through the province, running the entire length from the Peace Bridge to the Ambassador Bridge. Unlike the other four Great Lakes, Lake Ontario is posted not as a circle tour but as part of the US-only Seaway Trail. The trail begins in Erie County, Pennsylvania and travels through Buffalo, Niagara Falls, Rochester, Oswego, and Ogdensburg before ending at the Seaway International Bridge near Massena. Plans for the Great Lakes Circle Tours were started in 1985. The Michigan Department of Transportation (MDOT) was in consultation with its counterparts in Wisconsin (WisDOT), Minnesota (MnDOT) and Ontario (Ministry of Transportation of Ontario, MTO)
Nipissing Great Lakes both Lake Erie and Niagara Falls would lack the volume of water needed to cut the channel through the Niagara limestone cap rock. Lake Erie was a nonglacial lake in this period. The third stage of nonglacial development ended the Lake Algonquin. A fourth stage was initiated when the upper lakes entered the Nipissing Great Lakes stage and that volume of water was diverted through the outlet at North Bay, Ontario. At this low stage, Lake Erie was to lower than present lake level and which lasted throughout the time of the Nipissing Great Lakes. The Lake Algonquin period of