 After crossing the creek, MD 639 turns north onto Willowbrook Road, a two-lane road that passes through two roundabouts at the entrance to the Western Maryland Regional Medical Center and then enters the city limits of Cumberland.After passing the entrance to Allegany College of Maryland, MD 639 turns northwest, passing Country Club Road before reaching its northern terminus at a diamond interchange with the I-68, US 40, and US 220 (National Freeway).The roadway continues as US 40 Alternate (Baltimore Avenue), which heads toward downtown Cumberland.