By accident I came across a web page by Metrolinx. Go to findtheway.ca It is a portal for transportation information in the Greater Toronto and Hamilton Area.
You will find an interactive map for the regions and cites of the GTA. Dig further into the site and you will find information on public transit authorities, intercity transit, cycling and more. Click on any of the city or town links and you will find more information on local transit, plus info on hiking and cycling trails.
This web page is up my alley.