Locations

SiteCountyStateRHI5RHI10RGI5RGI10Last measurement
Ricketts Glen State ParkSullivanPennsylvania148.64139.5710.239.0212/31/2013
Edwin & Percy Warner ParksDavidsonTennessee145.64139.5315.8614.5901/28/2024
White Clay Creek PreserveChesterPennsylvania146.76139.3812.1510.5111/27/2012
Ridley Creek State ParkDelawarePennsylvania144.32139.3517.2014.6711/30/2010
Big CreekGrundyTennessee143.58139.338.647.9801/04/2025
First State National Historical ParkNew CastleDelaware146.42139.1713.9011.8910/25/2014
Hurricane CreekHaywoodNorth Carolina152.30138.6214.4712.0612/22/2006
Avalon Section Of Patapsco Valley State ParkHowardMaryland147.14138.5114.3112.4712/15/2017
Rock Island State ParkWarrenTennessee142.44138.2511.299.9712/30/2023
Sand RunSummitOhio147.47138.2212.7310.5111/17/2013
Ellison ParkMonroeNew York147.62138.139.878.5512/26/2025
Santeetlah CreekGrahamNorth Carolina147.12138.0015.1912.1809/08/2009
Montgomery Bell State ParkDicksonTennessee144.20137.4910.889.8401/02/2026
Camp CreekRabunGeorgia148.76137.469.787.4109/21/2013
Radnor Lake State ParkDavidsonTennessee144.36137.3110.889.8401/10/2026
West Virginia Single Tree Sites54 CountiesWest Virginia145.62137.0624.1422.2701/01/1963
Lee BranchOconeeSouth Carolina147.80137.009.807.8205/18/2004
Big Oak Tree State ParkMississippiMissouri141.62136.8119.7517.4311/26/2022
Fort Hil Earthworks And Nature PreserveHighlandOhio142.18136.6910.319.7111/02/2014
West Flint CreekLawrenceAlabama139.50136.6011.8710.1701/06/2006
Robert H. Treman State ParkTompkinsNew York143.10136.598.107.1906/10/2019
Hocking Hills SP, OHHockingOhio148.38136.4410.179.2301/17/2011
Shelton LaurelMadisonNorth Carolina146.28136.0412.438.8205/25/2006
Belt Woods - South TractPrince George'sMaryland148.22135.8113.8211.1401/24/2010
Bridgestone Nature ReserveWhiteTennessee138.96135.628.327.2810/25/2025
Cheat LakeMonongaliaWest Virginia141.80135.5510.277.7712/12/2018
Hermosa CreekLa PlataColorado165.58135.5413.529.5210/04/2016
Fischer Old Growth Natural AreaTompkinsNew York142.88135.478.567.4909/16/2018
Lucien Morin County ParkMonroeNew York142.62135.459.987.6712/26/2025
Big BasinCattaraugusNew York144.06135.3613.2811.9208/24/2021
Smedley ParkDelawarePennsylvania141.36135.2313.7711.3311/18/2011
Montpelier - Landmark ForestOrangeVirginia144.54135.0715.4912.1412/30/2009
Montpelier Estate Landmark ForestOrangeVirginia147.06134.709.757.2812/12/2019
North Chagrin Reservation (Forest Only)LakeOhio141.96134.7014.8813.4802/20/2018
Glover - Archbold ParkDistrict Of ColumbiaDistrict of Columbia142.30134.5310.969.7710/24/2008
Germantown MetroparkMontgomeryOhio142.92134.3012.399.9312/11/2020
Saddle GapTransylvaniaNorth Carolina144.62134.167.885.6001/07/2011
Porters BowlSevierTennessee147.64134.0717.0012.4311/03/2004
Laurel Fork Heritage PreservePickensSouth Carolina146.76134.030.000.0003/09/2013
Collins GulfGrundyTennessee140.56133.928.416.7506/21/2025
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