This is the mouth of the Lavase River, where it enters Lake Nipissing. For 150 years The Voyageurs paddled through this channel in the spring, on their way west to Thunder Bay on Lake Superior. The return voyage passed this point and ended up in Montreal in the Autumn. Lake Nipissing is controlled by dams on the French River these days, and there are navigation markers in place. However the place is pretty much the same as it would have been 150 years ago.
In the spring the water would be much higher than it is in this photograph, but by fall it would probably have been as you see it here.