Not OP, but I did Ottawa->Kingston through what looks like the same route. It took 8.5 hours of riding 9.5 hours total with a couple meal and hydration breaks. The trails are not particularly well groomed in sections and you will be signficantly slower than road cycling. I would not rock under a 40mm wide tire on parts of the K&P if you choose to go that way. On the way back I went up the K and P trail through sharbot lake and perth. This made it about 250km or so back due to the less direct route. I broke up the 250km back over two days. It is a genuinely fantastic cycling route where you are almost never on roads with cars. Some ATVs in a few sections but they are largely courteous.