 SR 224 begins at an interchange with I-82 in southern Benton City. After only 0.05 mi (80 m), SR 224 intersects SR 225 and turns east along Kennedy Road. After passing a park and ride lot on the south side of the highway, the road turns back to the north on Van Giesen Street, paralleling the Yakima River, slowly turning northeast through a rural area of Benton County. After passing through farmland SR 224 becomes the main east-west thoroughfare of West Richland. Exiting the town, the highway passes over the Yakima River and enters Richland. Before the highway terminates at an intersection with SR 240 southeast of the Richland Airport, the highway crosses over a single track belonging to the Port of Benton and managed by Tri-City Railroad. Van Giesen Street continues east from the terminus of SR 224 for another 1.7 miles (2.7 km), turning south as Hains Avenue at the Columbia River.
