Marquam Nature Park 
SW Marquam & Sam Jackson Rd
Portland, OR 97201
503-823-PLAY
http://www.portlandonline.com/parks/finder/index.cfm?action=ViewPark&PropertyID=251
Park: Bike, Hike, Picnic, Walk
Marquam Nature Park has been preserved as an undeveloped open space. The Nature Park was the final link in the westside trail system chain, making it possible to hike from the Sellwood Bridge to the St. Johns Bridge along preserved park trails.