Lake Stanley was a short-lived postglacial freshwater lake in part of the present-day Lake Huron basin about 10,000 years before present. Its surface lay about 70 meters below modern Lake Huron, and it received water from a large watershed tied to Lake Chippewa, including what is now the Lake Michigan basin. It drained near present-day North Bay, Ontario. Its submerged shoreline preserves evidence of the period’s landscape and ecology, including stone arrangements that may have been hunting drive lanes for migratory caribou. As the land rebounded after ice-sheet retreat, the North Bay outlet closed, waters rose, the Mackinac Straits were inundated, and the modern connected Lake Michigan–Lake Huron system began to form.