For the more information about the air resources of the National Park Service, please visit http://www.nature.nps.gov/air/.
A true prairie remnant, Hayden Prairie is where Iowa State University conducted research demonstrating that prairie communities decline when the quantity of litter exceeds annual herbage yield. Research has resulted in management to maintain the integrity of the prairie plant community.
Location: Howard County, IA
Year designated: 1965
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