Might be a dumb question , but...for you GTAers, where do Lake Ontario's western tribs end , and the eastern tribs begin?
(Living in the "centre" of Southern Ontario, I refer to Lake Huron's rivers/creeks as the "western" tribs; Lake Erie and Ontario as "eastern")
(Living in the "centre" of Southern Ontario, I refer to Lake Huron's rivers/creeks as the "western" tribs; Lake Erie and Ontario as "eastern")