A motorcyclist killed in a collision with another rider west of Mountain Center was identified Tuesday, Aug. 11, as a 69-year-old Hemet resident. Donald Van Riper was fatally injured about 12:40 p.m. Sunday, Aug. 9, on state Route 74 in the San Bernardino National Forest. According to the California Highway Patrol, he was riding his motorcycle on the eastbound side of the two-lane corridor when his bike and another one collided. It was unclear whether the two motorcyclists were part of a group ride. Van Riper was pronounced dead at the scene by Riverside County Fire Department paramedics. Two people were seriously hurt in the crash and were airlifted to a trauma center for treatment, according to the fire department. The CHP’s investigation into the collision is ongoing.