Meriwether Lewis stood at this site as he reached the Continential Divide (also today's the Montana and Idaho state lines) and saw the terrain he and the Expedition were faced with crossing. Lewis knew the gps coordinates of the mouth of the Columbia River entering the Pacific Ocean and knew his current coordinates and calculated that they were 600 miles from their final destination. Then and as in this picture, he saw snow capped mountain tops in the distance. He knew crossing these mountains would be hard but he probably underestimated how hard these mountains would become. Most, if not all members of the Expedition, later considered this their most challenging section of their travels.