On February 18, 2011, 53-year-old Margaret Mary Kohler of Waldport, Oregon, told friends she was going for a walk with her five-year-old lab/collie mix Roscoe. She didn’t return, and an acquaintance reported her missing on February 20. The last known area was the Florence vicinity in Lane County, where she was thought to be hiking or possibly truffle hunting in the Siuslaw National Forest—a familiar place for her walks.

On March 3, U.S. Forest Service employees found her unoccupied maroon Toyota minivan parked at the Cummins Ridge Road Trailhead, which leads into the Cummins Ridge Trail and Cummins Creek Wilderness. Search teams from Lane and Lincoln County Sheriff’s Offices, the U.S. Forest Service, and State Police scoured the rugged, steep and sometimes slick terrain but found no sign of Kohler. Roscoe was located on March 5 at Ten Mile Creek, about 2.25 miles south of the vehicle; the dog was healthy but could not lead searchers to her.

Authorities say foul play is not suspected and the case remains an active missing person investigation. What information might someone who frequented the Cummins Ridge Trail have about Margaret’s movements that week?