In city, closer to you is Marymoor Park (http://www.metrokc.gov/parks/marymoor/) or Cougar Moutnain Park (http://www.metrokc.gov/parks/parks/cougarmountain.html). I am a huge fan of Discovery Park (http://www.seattle.gov/parks/Environment/discovparkindex.htm). I'll second Loree's suggestion of Lincoln Park (http://www.seattle.gov/parks/parkspaces/lincoln.htm).