Cook_County_GISThis layer contains polygons representing land that is under the jurisdiction of the Illinois Nature Preserves Commission (INPC), being designated either as a Nature Preserve, Nature Preserve buffer, or Land & Water Reserve and lying within the boundaries of the Forest Preserve District of Cook County. Actual nature preserve boundaries may vary slightly from GIS polygons shown and should be verified with legal descriptions provided by INPC and Cook County Recorder of Deeds. For more information on Illinois Nature Preserves and the INPC, please visit: Illinois Nature Preserves Commission Website Source data is maintained by the Forest Preserve District's Planning and Development Department (GIS Section) and uploaded to this layer daily.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/c76803d5827842f9807a79699362fd42_0engCook CentralPublicForest Preserve District of Cook County Nature Preserves [Illinois--Cook County]Web servicesIllinois--Cook CountyIllinoisLast Modified: 2026-01-08