Closed 2012, looking for a new spot:
Bothel's skatepark is located just behind the highschool and is open from approx. 3:00 til 10:00. It's free and has lights. It is all covered with Skatelite so it should fair the weather pretty well.
It offers a pretty good street course thats spread across a few tennis courts and a 24 foot wide 6 foot tall mini ramp.