Arapahoe County Colorado
Along the South Platte River in Arapahoe County, Colorado, all gravel bars contain placer gold. Â Also, along Cherry Creek, Dry Creek, and Cottonwood Creek in T5S, R66W and R67W had many productive placer workings. All regional tributary gravels contain placer gold.
Southwest of Denver, in the Holy Cross Mountains, many small mines produced lode gold. Some placer workings as well.