WENATCHEE – The Washington State Patrol is investigating a tragic fatality collision that occurred on Sunday, Aug. 19, 2012 at approximately 9 a.m. on State Route 153, 12 miles North of Brewster.

The collision involved a group of four motorcycles traveling southbound on SR 153. WSP detectives are seeking witnesses that may have seen any of the events prior to and leading up to, or the collision itself.

A Spokane woman died when two of the motorcyclists collided while trying to slow for traffic, according to the original WSP report. Bonnie L. Grant, 49, was riding southbound with Deanna M. Griffith, 52, Spokane at 9 a.m. when both motorcycles slowed quickly for traffic and collided with each other. Grant’s 2001 Yamaha XVS650 left the roadway to the right and she was ejected, according to Trooper G. Ames’ report. Grant was taken to Three Rivers Hospital where she was pronounced deceased. Griffith, who was riding a 2006 Harley Davidson XL1200, was also taken to the hospital and treated for shock.

Both riders were wearing DOT approved helmets and there were no drugs or alcohol involved in the accident, which is still under investigation by the WSP.

Anyone with any information or knows somebody that does, should contact Detective Vik Mauro at (509) 682-8142 or email Victoria.Mauro@WSP.WA.GOV.