The collision was reported at 3:49 p.m. where Highway 20 crosses Parker Road, according to a Washington State Patrol memo.
A Yelm man, 73, was driving a motorcycle when he struck a Nissan Altima that was stopped to make a left turn.
The Yelm man was taken to the hospital, as was his passenger, a 73-year-old Chehalis woman.
The Nissan driver, a 46-year-old Coupeville woman, was unhurt.
Troopers are investigating.
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