If you are into outdoors and hiking then Chirico trail or Pilot's trail is a great hike at Tiger Mountain. Total of 4 miles, it takes you to the launching place for Paragliding. Once you are at the top the views of Seattle are amazing. On a windy day you can park your car at the bottom of the trail and watch people land their gliders.

http://www.seattleparagliding.com/ls_about.html