I think Toronto's trails are largely scenic. There are wild ravines and parks in the middle of the city with trails through them. They're multi-use, and when I go on them I see (depending on how wild the trails are and in what part of town) joggers, bikers, dog walkers, families, and sometimes evidence of horses. Some of the trails are too rough to be convenient for commuting, because riding on them is just too slow. But they're marked on the city bike map as green dotted lines, and I tend to stay away from those in favour of the solid green (paved/packed MUPs), blue/gold (low-traffic streets) and red (marked bike lanes on streets).