For the more information about the air resources of the National Park Service, please visit http://www.nature.nps.gov/air/.
There are 13 National Natural Landmark sites located entirely within the state of Colorado. An additional site, Sand Creek, while located primarily within Wyoming does extend into Colorado. Natural features represented include one of the best examples of Arctic tundra in the conterminous U.S., excellent examples of the titled and faulted sedimentary strata of the Colorado Front Range, and internationally known paleontological sites. Eleven of the CO sites were designated over the course of two decades from 1965 to 1984. Sixteen years later, Hanging Lake was designated, as was the Morrison Fossil Area expanded to included several fossil sites in Golden, CO. Big Spring Creek, the 13th and most recent NNL site in the state, was designated in 2012. The CO sites range in size from 60 acres to the nearly 380,000-acre Spanish Peaks. Site ownership includes U.S. Forest Service, Bureau of Land Management, Bureau of Reclamation, National Park Service, state, municipal and private.
Below is a map of sites in Colorado.
Please remember, National Natural Landmarks (NNLs) are not national parks. NNL status does not indicate public ownership, and many sites are not open for visitation.
Last Updated: June 28, 2012