Magnusen Park Off-Leash Area
I was nearly 2 years into owning a dog in Seattle before I discovered this park, and I'm so glad I did. To begin with, it's HUGE. You could spend hours here wandering, meeting other dogs, and taking in the views. There's also easy parking, a convenient coffee/dog treat truck, and a dedicated space for small/shy dogs (we started there and soon graduated.) This dog park is worth a trek.