Stillaguamish Senior Center 18308 Smokey Point Blvd. Arlington, WA. 98223 Driving directions: Take I-5 Exit 206 (Smokey Point). From the exit ramp, go EAST on 172nd St. NE (SR-531) to Smokey Point Blvd. (0.2 mi.). Turn LEFT (North) onto Smokey Point Blvd. and go 0.6 mi. to the Stillaguamish Senior Center (on the left).