Clear Creek is a tributary of the South Platte River, approximately long, in north central Colorado in the United States. The creek flows through Clear Creek Canyon in the Rocky Mountains directly west of Denver, descending through a long gorge to emerge on the Colorado Eastern Plains where it joins the South Platte. Clear Creek is unusual in that it is a stream named "creek" fed by a stream named "river". Fall River empties into Clear Creek along I-70 west of Idaho Springs, Colorado.