The lower falls is the larger section of the two part Yellowstone Falls. The Yellowstone River leaves Yellowstone Lake and heads north. It wonders through the Hayden valley and then plunges 109 feet over the Upper falls. It travels another quarter of a mile and then it plunges another 308 feet down into the Grand Canyon of Yellowstone. At over 300 feet it is almost twice as high as Niagara Falls. It was named in 1869 by the Cook, Folsom, Peterson Expedition.