JSAR responded to the Big Quilcene River trail for a report of CPR in progress in the area of Marmot Pass. Hikers in the area were assisting. Due to the nature of the call and the six-mile distance from the trailhead, the assistance of NAS Whidbey Island SAR was requested immediately. The Navy helicopter was able to locate the party and set down nearby. The Navy paramedic reached the patient, but it was determined that further lifesaving efforts were in vain. The helicopter transported the subject.