I go to Humber (advertising 2nd year), and really there isn't much other than blue or mslm. All of the smaller hills people talk about are on the east side and are more or less the same distance/ not really worth it except for the parks. The closest (very)small hill is at Centennial park but I am not even sure if it opened last year given the shit winter.
I think I got 2 decent Ontario pow days in last year and blue seems to be the place to go for that kind of stuff (biggest hill). Their open tree areas aren't that big or challenging, so like camp fortune people find or make them. I imagine they follow bike paths, but I have yet to locate them. If you have any questions feel free to hit me up, and especially hit me up if you own a car as I am wanting to carpool.
And to the other guy, you can find pow runs all day if it snowed, you just have to be a little more creative than everyone else.