Gatineau River - To be very transparent I have only run this section twice so am by no means the authority on it, however it is a sensational run and it needs to be on Paddling Maps. If anyone has better info and beta, please suggest a change!
This run is a large volume Class III/IV run, and although large in size, most have a clean 'tongue' line avoiding the larger, more challenging features. When putting in at the Bonnet Rouge rafting put in there are 6 or 7 rapids of varying size, all scoutable and most are sneakable in some capacity.
The character and difficulty of the river vary greatly based on wildly differing water levels. I was told that on a low water run the river can get 6' or more higher in the Spring. I paddled it in very low water one day and then about 2' higher than that a week later. It seems there is no rhyme or reason to the flow in the late summer as flows are regulated by upstream dams. In the Spring expect high water and much larger features.
It is a little out of the way but well worth the drive!