{"data":{"id":"us-il/20-ilcs-840-3.3","jurisdiction":"us-il","citation":"20 ILCS 840/3.3","heading":"State natural areas.","body":"State natural areas (SNAs) are areas of land in public ownership which, either retains or has recovered to a substantial degree its original natural or primeval character, though it need not be completely undisturbed, or has floral, faunal, ecological, geological or archaeological features of scientific, educational, scenic or esthetic interest. The following described areas are designated State Natural Areas and shall have the names ascribed to them in this Section:\nAlorton Heron Rookery SNA in St. Clair County;\nAnnbriar Karst SNA in Monroe County;\nAyers Sand Prairie SNA in Carroll County;\nBarton-Sommer Woodland SNA in Mason and Menard Counties;\nBerryville Shale Glade SNA in Union County;\nBig Grand Pierre Glade SNA in Pope County;\nBlack Crown Marsh SNA in McHenry County;\nBrown Barrens SNA in Union County;\nBurton Cave SNA in Adams County;\nCache River SNA in Johnson County;\nCalamus Lake SNA in Macon County;\nCecil White Prairie SNA in Hancock County;\nCedar Glen SNA in Hancock County;\nCedar Lake Bog SNA in Lake County;\nChauncey Marsh SNA in Lawrence and Crawford Counties;\nChestnut Hills SNA in Pulaski County;\nClear Creek Wetland SNA in Cass County;\nCollier Limestone Glade SNA in Hardin County;\nCretaceous Hills SNA in Pope County;\nCypress Pond SNA in Johnson and Union Counties;\nDean Hills SNA in Fayette County;\nDeer Pond SNA in Johnson County;\nDenby Prairie SNA in Macoupin County;\nDevil's Prop SNA in Jefferson County;\nEagles Landing SNA in JoDaviess County;\nEllison Creek SNA in Henderson County;\nElton E. Fawks Bald Eagle Refuge SNA in Rock Island County;\nEmbarras River Bottoms SNA in Lawrence County;\nFall Creek Scenic Overlook SNA in Adams County;\nFlag Pond SNA in Clay County;\nFogelpole Cave SNA in Monroe County;\nFoley Sand Prairie SNA in Lee County;\nFranklin Creek SNA in Lee County;\nFrench Bluff SNA in Carroll County;\nFults Hill Prairie SNA in Monroe County;\nFunks Grove SNA in McLean County;\nGeissler Savanna SNA in Hancock County;\nGeorge S. Park Memorial Woods SNA in Putnam County;\nGibbons Creek Barrens SNA in Pope County;\nGillespie Prairie SNA in Macoupin and Montgomery Counties;\nGinther Farm SNA in Menard County;\nGoodes Woods SNA in Macoupin County;\nGoose Lake Prairie SNA in Grundy County;\nGooseberry Island SNA in Kankakee County;\nGrigsby Marsh SNA in McDonough County;\nGrubb Hollow Prairie SNA in Pike County;\nGuthrie Cave SNA in Union County;\nHanging Rock Sandstone Cliff SNA in Clay County;\nHanover Bluff SNA in JoDaviess County;\nHarlem Hills SNA in Winnebago County;\nHarper-Rector Woods SNA in Fulton County;\nHarry \"Babe\" Woodyard SNA in Vermilion County;\nHenry Allan Gleason SNA in Mason County;\nHitts Siding Prairie SNA in Will County;\nIllinois Caverns SNA in Monroe County;\nIroquois Woods SNA in Kankakee County;\nJackson Slough Woods SNA in St. Clair County;\nJames \"Gene\" Korando Pond SNA in Jackson County;\nJulius J. Knobeloch Woods SNA in St. Clair County;\nKidd Lake Marsh SNA in Monroe County;\nKishwaukee River SNA in DeKalb County;\nLake Como SNA in Whiteside County;\nLake in the Hills Fen SNA in McHenry County;\nLake Renwick Heron Rookery SNA in Will County;\nLong Branch Sand Prairie SNA in Mason County;\nLong Run Seep SNA in Will County;\nLower Fox River – Blake's Landing SNA in LaSalle County;\nLusk Creek Canyon SNA in Pope County;\nManito Prairie SNA in Tazewell County;\nMargaret Guzy Pothole Wetlands SNA in Shelby County;\nMarissa Woods SNA in St. Clair County;\nMassasauga Prairie SNA in Warren County;\nMatanzas Prairie SNA in Mason County;\nMaxine Loy SNA in Marion County;\nMcClure School Shale Glades SNA in Union County;\nMcMaster Woods SNA in Greene County;\nMeredosia Hill Prairie SNA in Morgan County;\nMiller Shrub Swamp SNA in Marion County;\nMiller-Anderson Woods SNA in Bureau and Putnam Counties;\nMillhurst Fen SNA in Kendall County;\nMineral Marsh SNA in Henry County;\nMississippi River Sand Hills SNA in Hancock County;\nMitchell's Grove SNA in LaSalle County;\nMomence Wetlands SNA in Kankakee County;\nMontebello SNA in Hancock County;\nNachusa Prairie SNA in Ogle County;\nOakford SNA in Mason and Menard Counties;\nPecumsaugan Creek/Blackball Mines SNA in LaSalle County;\nPeoria Salvation Army Woods SNA in Peoria County;\nPine Rock SNA in Ogle County;\nPiney Creek Ravine SNA in Randolph and Jackson Counties;\nPrairie Ridge SNA in Jasper and Marion Counties;\nPrairie State Eagle Refuge SNA in Hancock County;\nPrimm's Pond SNA in JoDaviess County;\nRall Woods SNA in JoDaviess County;\nRalph Clover SNA in Jackson County;\nRedwing Slough SNA in Lake County;\nRevis Hill Prairie SNA in Mason County;\nRock Cave SNA in Effingham County;\nRockton Bog SNA in Winnebago County;\nSand Prairie-Scrub Oak SNA in Mason County;\nSandy Ford SNA in LaSalle County;\nShick Shack Sand Pond SNA in Cass County;\nSielbeck Forest SNA in Massac County;\nSipple Slough Woods SNA in Washington County;\nSparks Pond SNA in Mason County;\nSpring Bay Fen SNA in Woodford County;\nStemler Cave Woods SNA in St. Clair County;\nSunbury Railroad Prairie SNA in Livingston County;\nSwayne Hollow SNA in Randolph County;\nTapley Woods SNA in JoDaviess County;\nThomson-Fulton Sand Prairie SNA in Whiteside County;\nThorn Creek Woods SNA in Will County;\nVolo Bog SNA in Lake County;\nWagon Lake SNA in St. Clair County;\nWard's Grove SNA in JoDaviess County;\nWillow Creek SNA in Edgar County;\nWilmington Shrub Prairie SNA in Will County;\nWise Ridge Bedrock Hill SNA in Johnson County;\nWolf Road Prairie SNA in Cook County; and\nYorkville Prairie SNA in Kendall County.","path":["CHAPTER 20 EXECUTIVE BRANCH","State Parks Designation Act."],"source_url":"https://www.ilga.gov/legislation/ILCS/details?ActID=281\u0026ChapterID=5\u0026ChapAct=FullText\u0026Print=True","current_through":"at least Public Act 104-790","vintage":"","retrieved_at":"2026-09-15T04:46:14Z","sha256":"a3c7912fca0224e973bc406d938c74f3c4ef157050e0698f74c2ff0b84eb739c","source_id":"us-il","stale":false,"prev":"us-il/20-ilcs-840-3","next":"us-il/20-ilcs-840-3.4"},"notice":"GroundRules: Original legal text. Not legal advice."}