Resources for hiking:

Washington Trails Association is an organization that empowers hikers and other outdoor enthusiasts to steward the outdoors. They also run a killer trail guide where people review hikes very often (nearly daily for most trails).

The Hiking Project is run by REI and features an amazingly useful trail map with the ability to easily create a to-do list, and even has on-trail navigation. I love the elevation profile graphs for each hike.