While fishing on September 5, 1980, Douglas Trapp stumbled across three footprints in the sandy river bank of the Stillaguamish River near Robe Canyon outside the small town of Granite Falls, WA. Two of the footprints were side by side, but one was spaced about five feet away behind the others. Backtracking the creature, two slide marks were found on a slope nearby where the creature apparently slid downwards towards the river. It apparently entered the river. No further tracks were found in the vicinity.