The crash happened shortly after 5 p.m. Wednesday on Fort Road and Tecumseh Road, 15 miles west of Wapato.
Troopers say a pickup truck was traveling west on Fort Road when the driver, Forrest Stwyer of White Swan, lost control of the truck.
The truck hit a car going in the opposite direction. It had three White Swan residents inside including 64-year-old passenger Joyce Kelley who died at the scene.
Five others were injured in the collision and taken to a local hospital.
Troopers add that it's unknown if drugs or alcohol were involved.