A crash south of Shelton sent four people to the hospital Sunday and closed a lane of northbound US 101 for an hour, the State Patrol said.
The wreck happened about 2:30 p.m. at Southeast Lynch Road, 3.5 miles south of Shelton.
Three Olympia woman were heading west on Lynch Road in a silver 2007 Ford Focus, and as they crossed US 101, hit a green 1995 Acura Legend that was heading north on the highway, the State Patrol said.
The 72-year-old driver of the Focus and her 83-year-old and 85-year-old passengers went to Mason General Hospital with injuries, as did the 22-year-old Shelton woman driving he Acura.
Further information about their conditions was not immediately available. All involved were wearing seat belts.
The State Patrol said the Focus driver caused the crash by failing to yield. It was not immediately clear if the woman would be cited or charged.