The deadly collision happened Wednesday afternoon along rural Highway 97 between Kent and Shaniko, Ore., killing Jacques R. Gordon, 21, and his mother, Renee M. Parent, 54, both of Burien.
They were enroute to a Young Life camp near Antelope, Ore., at the time of the accident.
An investigation by the Oregon State Police found that Gordon was driving south on Highway 97 in a 2005 Toyota Corolla, with his mother in the passenger seat, when the crash happened.
Sgt. Les Kipper says the Toyota moved into the northbound lane, attempting to pass a southbound commercial truck, when Gordon lost control as a northbound commercial truck approached straight toward him.
The car crossed broadside toward the southbound lane and was struck in the driver's side in the northbound lane by the commercial truck.
After the initial collision, the southbound commercial truck was sideswiped by the northbound truck. The northbound truck then veered off the east side of the highway before coming to rest.
With the help of people who stopped at the scene, the driver of the northbound truck got out of his vehicle and later was taken by ambulance to Mid-Columbia Medical Center in The Dalles for treatment of non-life threatening injuries.
Gordon and Parent were pronounced dead at the scene, Kipper said.
The driver of the southbound truck was not hurt.