adma
Superstar
If you're looking for the neighbourhoods with the most extensive pathway systems, they would almost certainly be the L'amoreaux/Milliken areas of north Scarborough. There's a few pedestrian bridges but nothing large or interesting. What is interesting is the sheer quantity of trails, with several creek trails and parks joined by a nearly continuous series of walkways connecting virtually every crescent and cul-de-sac with both each other and with arterial roads. Driving around these neighbourhoods' loopy trails is time consuming, but you can walk almost anywhere in a straight line. These areas are loosely planned on the Don Mills model.
The resemblance compounded, of course, by several Donway-style "circle nodes": Bridletowne, Alton Towers, etc...