This is how a park, and dog park should be like - love the whole concept embedded in Sunnbrook Park.
There is really no direction to how to get there once you enter the whole Sunnybrook
area, you either follow you guts (aka drive away from buildings and into the direction of trees), or use google maps.
You got your trails, couple of them. Easy trails for you and your dog. There's an amazing off leash fenced area for dogs - spacious, clean, no garbage or waste whatsoever. There are couple benches and a water fountain. Good shades from trees, and a smaller area just for small dogs.
There is also a river that goes around the park, and dogs are more than welcome to hop in for some cooling down. Along some of the fenced trails that divide the walking area from the river have very low fences. It is not an off leash area so people should have their dogs on leash, and dogs therefore should not be jumping over them! I don't see a problem with that.