 This northeast-southwest trending lake had a maximum width of about , a length of around and an elevation of approximately .There were at least two creek inflows, including one from neighbouring O'Connor Lake.The primary outflow was an unnamed creek from the south end of Vermilion Lake to Tetapaga Lake which eventually flows via the Tetapaga River, Lake Temagami, the Temagami River, the Sturgeon River, Lake Nipissing and the French River into Lake Huron.