The highway travels north as the western boundary of Port Ludlow and intersects Oak Bay Road, the primary access road for the community, before leaving Port Ludlow along Chimacum Creek to the west and Oak Bay to the east.

SR 19 crosses Chimacum Creek into the unincorporated community of Chimacum and becomes Rhody Drive and continues north into Port Hadlock-Irondale and intersecting Ness Corner Road, signed as SR 116, a connector to Indian Island and Fort Flagler State Park to the east.

The highway leaves Port Hadlock-Irondale as the Airport Cutoff Road and serves Jefferson County International Airport before ending at an intersection with SR 20 southwest of Port Townsend west of Fort Townsend State Park.

In 2011, WSDOT calculated that between 6,400 and 13,000 vehicles per day used the highway, mostly in near the Jefferson County International Airport.

[8] The route of SR 19 roughly follows an existing unpaved road built by the 1950s and paved in the 1960s.