Driving DirectionsTake I-5 to Exit 253 (Highway 22/Mission Street Exit). Turn West and follow Mission toward the Capitol and Willamette University. After passing 17th Avenue, continue up over the overpass and go past the Willamette University/State Capitol exit, staying on Mission. As you come down from the overpass, COSA is on your right. Exit on the right into the parking lot from Mission at the base of the overpass. We are located in The Association Center (not University Station). Address: 707 13th Street SE, Salem, OR 97301 Phone: (503) 581-3141. For a detailed map try this special Google search.