Another shot from Barron Canyon today. A canoe can be spotted far below, and having another hiker in the shot gives perspective and scale. The canyon was formed as a fault line, part of the massive slab of granite that is the Canadian Shield. It has more recent geological history- in the wake of the last ice age, the water that ran through here drained a glacial lake to the west. Its flow at that time has been estimated by geologists to be the equal of a thousand Niagaras. It is considerably calmer now. The Barron River flows out from Algonquin, joining the Petawawa River and emptying into the Ottawa River at Petawawa, up the valley from the capital.