SR 240 continues across the Yakima River Delta as a fully grade-separated freeway, fronted to the west by a branch of the Union Pacific Railroad and the east by the Sacagawea Heritage Trail. The freeway narrows to six lanes at an interchange with the Columbia Park Trail in the Richland Wye and to four lanes at a partial cloverleaf interchange with Columbia Center Boulevard, located north of the Columbia Center Mall and the Toyota Center. SR 240 enters Kennewick after the interchange and continues along the south side of the Columbia River and Columbia Park, passing north of suburban neighborhoods and the Vista Field airport, which closed in 2013. The freeway intersects Edison Street and Columbia Park Trail on the north side of the railroad before reaching its eastern terminus, a dogbone interchange with US 395 at the south end of the Blue Bridge. The interchange also includes direct ramps to the northbound lanes of US 395 as well as access to Columbia Drive, a local street that connects to downtown Kennewick. The junction is located near the site where the Kennewick Man, a skeleton belonging to a 9,000-year-old man, was discovered in 1996.