Another great site that uses Google Maps can be found at:
http://www.bikely.com/
Registration is free here too, and there are a number of Ontario routes
already created there.
For one example, check this link for a route from Waterloo to Tim's in
Fergus and back.
http://www.bikely.com/listpaths/by/alanm
(My userid on bikely.com is alanm.)

I've got dozens and dozens of route maps I've created for myself with
Microsoft Streets'n'Trips, and over this winter I'm going to recreate
my favourites in bikely.com to make them easier to share.
Cheers,
...alan
Alan Medcalf
Waterloo ON
Winterborne Bicycle Institute
www.winterbornebikes.com