Deer Creek, a stream in the western Grand Canyon of Arizona, enters the Colorado River from the right bank and is sustained by natural springs, giving it a rare perennial flow in an arid region. In its final half mile, the creek tightens into a slot canyon before plunging over Deer Creek Falls, a waterfall about 150 feet high. Though known for its beauty, the drainage can turn dangerous during intense rain, when severe flash flooding surges through it. Within Grand Canyon National Park, Deer Creek and its falls are a popular stop on river trips and are also accessible from the North Rim by trail.