Hi,
Just saw your post from Feb regarding trails for long rides in Ontario.
I am in Ottawa, I ride the OFATV trial system, which also ties with the EOTA and trillium trails network.
This is the EOTA website:
Eastern Ontario Trails Alliance
This is the EOTA trail map:
Bing Maps
There is places to stay (hotels) while on a multi day run, and places to eat on the trail system.
Also go to:
Home | Ontario Federation of All Terrain Vehicles
There is many clubs that make up the OFATV, and all their maps are accessible through there pages that are linked off the OFATV web site.
Cheers Chad.