​The BT 700 isn't the only multi-day bikepacking route in Ontario. The Central Ontario Loop Trail (COLT) links a number of small communities in the Kawartha Lakes region of Ontario using mostly rugged rail trail. The map above shows the route I followed in 2017. In a few cases, I ventured off the rail trail to ride on some excellent gravel roads as a nice break from the flat riding. (Rail trails can be predictable to a fault.) You can find out more about the COLT here: http://www.bikepacking.com/routes/central-ontario-loop-trail/
Note that Miles in the Bikepacking.com route ventured further south to ride along the lakeshore, but we decided to stick with the quieter inland option. There are several places along the COLT where your ride can start.