 SR 169 continues northwest through the city of Black Diamond, surrounded by several coal mines, and passes a trailhead for the Black Diamond Natural Area near Lake Sawyer.It turns north at the southern boundary of Maple Valley, near a crossing of a railroad, and travels through several suburban subdivisions near Tahoma High School.The highway widens to five lanes in the city's Four Corners commercial center, where it intersects the eastern end of SR 516, which travels west to Covington and Kent.