St. Helens Oregon is about 80 nm up the Columbia from the bar. The past several years the sea lions have been following the salmon all the way to Bonneville Dam, another 50 miles upriver. On a February "cuise" (our moorage is right across the river) we came back to the boat after a hike on Sand Island to find this guy on the dock. As a reference the dock is 10 ft. wide. Our dog took a look and said "Hey, cool. Let me check it out". At the beginning of the finger was a big pile of what was probably Sea Lion Poo. She stopped, sniffed and immediately want and got on our boat without further comment.