Conquer Cancer rider
Join Date: Sep 2004
Bikes: Fun bike, city bike, Bike Friday bike (also fun bike)
No particular areas to avoid, and cars are mostly pretty courteous (with the exception of the cabs). The three main trails are along the waterfront (although there's a bit of road that you can't avoid as you get into Mississauga), along the Don Valley and up the Humber. You can link the three trails too, but it takes a bit of faffing around with the map from the Humber to the Don. A circular ride from Jarvis and Queen's Quay could take you along the Waterfront to the Humber bridge, then up the Humber to Old Mill, then back across along Annette and Davenport back to Church and then Jarvis. Or just keep going on the Waterfront Trail to Port Credit and retrace your steps. There's good riding outside the megacity too, although it takes mile upon mile of dreary suburb before you get there.
Watch for the streetcar tracks, and be sure to cross them at a good angle. I barely know a single Toronto cyclist who's not had an arguement with them and lost.
I'd be curious to know your impressions after you get here, and how it compares with Bay Area, which always strikes me as much more bike friendly than the Toronto sprawl.
Zero gallons to the mile