Try looking up Rideau lakes tour .. that pic might come up
show multiple routes taking u through the back ways
also the is a old rail bed that is a trail.. think in runs into Prescott area all the way up to Carleton place and then almonte
I have been on it from just north of smiths fall to almonte
crushed gravel .. loose flat and easy to ride.. not hilly.. but not great for road tires.. nice not having to think about traffic