(Gresham, OR)  --  Authorities say a car belonging to a missing Gresham woman has been found on the Eagle Creek Trail in the Columbia River Gorge.  Thirty-year-old Susan Behrens hasn't been seen since April 4th.  Behrens is described as white, with brown hair and brown eyes, about five-foot-four and about 110 pounds.  Anyone who's seen Susan Behrens is asked to call 503-823-3333.