From Whittamore's Farm (try the scones) on Steeles Ave, at the far reaches of Markham and Scarborough, I rode south through Rouge Park along Beare Rd and Plug Hat Rd to a new Toronto Zoo pathway. Check it out!
Bike lane on Steeles, unfortunately it's just a short segment, Whittamore's on the left
Start of the zoo path (notice the use of green at the crossings)
A refuge island mades this crossing easier
I love what the City of Toronto has done with this bridge, adding a cycling path protected by barrier.
Now it's easier to bike to the zoo!
There's a good connection to Conlins Road to cross Hwy 401, leading to a vast network of off-road trails to explore.