National Geographic : 1947 May
l: laitioai nuugripanei Oucley Kodachrome by Amos Burg Stern-wheelers on the Magdalena Resemble Mississippi River Boats of Mark Twain's Day Steamers tie up at La Dorada, nearly 600 miles from the mouth. The trip upstream takes a week or more, dependingonthe depth ofthetortuous channel. Low water and sand bars often ground the ships. The journey downstream goes twice as fast. The river is navigable forabout 800ofits1,000 miles.