The Pigeon River, which marks a thirty-one-mile portion of the US-Canada border, is the primary route by which voyageurs paddled to the Canadian interior. The lower Pigeon River, which empties into Lake Superior, alternates between navigable waters, cascades, and waterfalls. One of these, High Falls (pictured), is 120 feet tall—the highest in Minnesota. Voyageurs avoided the forbidding lower river by following the Grand Portage trail. Photo by Jon Lurie, 2020.