"Take a (Long)Bike Ride"
The Burke Gilman Trail runs from just west of the University of Washington Campus to the northern tip of Lake Washington. It's paved bike path all the way and for the most part free of traffic (there are a few places you have to cross a trafficed street). You'll skirt Gas Works park and Lake Union, pass by the University campue and eventually find yourself along the shoreline of Lake Washington. This is a very popular bike trail with miuch to offer every mile along the way.