A collision between two motorcycles killed a Spokane woman in Okanogan County this weekend. State Patrol says two motorcycles were traveling southbound on State Route 155 north of Brewster around 9a.m. Sunday when the both vehicles ran into each other. Troopers say the two bikes slowed abruptly for traffic and the motorcyle driven by 49-year old Bonnie Grant of Spokane left the roadway. Troopers say Grant was thrown off her motorcycle. Grant was taken to Three Rivers Hospital in Brewster where she died of her injuries. The other motorcyclist. . . 52-year old Deanna Griffith of Spokane came away physically unharmed but was transported to Three Rivers for shock. Troopers have ruled out the use of alcohol or drugs.