San Juan Islands, WA
I've been coming to the San Juan Islands two hours north of Seattle for the last 30 years and each time we try to do something new. Turtleback Mountain is on Orcas Island and a ferry or small plane is the only feasible way to get there if you don't have your own boat (like me). There are several trailheads with interweaving trails over the mountain. We took the South Trail near Westsound.