The Park Service says it ends at the high-water mark on the south bank. Tourists document a flight into Grand Canyon West. In 2015 helicopter tours helped draw over a million visitors to Hualapai ...

The Grand Canyon isn't a bowl; water flows through it at between 12,000 and 15,000 cubic feet per second. During a flood, that flow can increase to 300,000 cubic feet per second. "Imagine 300,000 ...