Hey Dif! Welcome!
I'm pretty new here myself. I'm from London, Ontario. Have a couple trips already planned for June, but mostly roads due to where they are. This fall though I am hoping to do the Central Ontario Loop Trail. Miles Arbour mapped it out and it goes from Fenlon Falls through Cobourg, Trenton, Bancroft, Kawarthas, and back to Fenlon Falls. There is a significant portion on old rail lines converted to gravel trails.
Links about the route are here:
http://www.ridingfeelsgood.com/solo-bikepacking-central-ontario-loop-trail-colt/http://www.bikepacking.com/routes/central-ontario-loop-trail/Alpinist, I'd love to bike in BC one day. Definitely a bucket list thing for me!