Press release from the California Highway Patrol:

On June 30th, 2023, at approximately 1735 hours, a single vehicle collision occurred on SR-3, two miles north of SR-36, south of Hayfork.  The driver was traveling northbound on SR-3, at an unknown speed, when the vehicle traveled off the road and collided into a tree.  The driver and passenger, who were wearing their seatbelts at the time of the collision, sustained fatal injuries and were pronounced deceased at the scene.  It is unknown if alcohol was a factor in this collision.  The cause of the collision remains under investigation by the Trinity River Area CHP.