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Sica Hollow
Sica Hollow
Sica Hollow displays many facets of natural history, including the glacial story of the River Warren, pothole lakes on the upland of Coteau, grasslands and prairie, and ravines where eastern deciduous forests grow. The site includes the eastern face of the escarpment of the Coteau des Prairies.
Location: Marshall County, SD ; Roberts County, SD
Year designated: 1967
Acres: 791
Ownership: State
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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
