Chalk Bluffs Natural Area

The Chalk Bluffs is a barren chalk escarpment in the northeastern part of the U.S. state of Colorado, stretching from the Wyoming border east of I-25 to near the South Platte River in Logan County and Weld County.

[1] The Chalk Bluffs exposes the Ogallala, Fox Hills and Arikaree Formations.

It has been recognized by the National Audubon Society as a site of "global importance".

A 640-acre (2.6 km2) portion of the Chalk Bluffs in Weld County were set aside in September 2001 by the Colorado State Parks Natural Areas Program as the Chalk Bluffs Natural Area.

[1] The bluffs are adjacent to the Cedar Creek Wind Farm.