The Chalk Cliffs Rearing Unit is a Colorado Parks and Wildlife cold water fish production facility located near Arkansas River and Chalk Creek in Chaffee County, Colorado.

Hatchery staff works to support the raising of approximately 700,000 catchable, ten-inch rainbow trout annually.

Water quality sampling by the Department of Public Health and the Environment found that the cause was high amounts of zinc and cadmium, from the Mary Murphy Mine upstream.

This was necessary as the levels were impacting fish habitats and water quality degradation in the Arkansas River.

The facilities provide fish for stock in many areas which supports angling recreation.