| Adams |
| Adams Lake Prairie State Nature Preserve |
| Adams Lake State Park |
| Buzzard Roost Rock (Private Area) |
| Chaparral Prairie State Nature Preserve |
| Davis Memorial State Nature Preserve |
| Johnson Ridge State Nature Preserve |
| Robert A Whipple State Nature Preserve |
| Serpent Mound State Memorial & Archaeology Site |
| Sparrowood Nature Area |
| Strait Creek Prairie Bluff State Nature Preserve |
| Tranquility Wildlife Area |
|
| Brown |
| Indian Creek State Wildlife Area |
| Ohio River - Aberdeen Wildlife Area |
|
| Butler |
| Governor Bebb Park |
| Hueston Woods State Nature Preserve |
| Hueston Woods State Park |
| Miami and Erie Canal Park Historical Site |
| Miami University Geology Museum |
| Public Fossil Collecting Area - Hueston Woods |
| Rentschler
Forest Preserve |
|
| Champaign |
| Cedar Bog State Nature Preserve |
| Kiser Lake State Park |
| Kiser Lake Wetlands State Nature Preserve |
| Ohio Caverns $ |
| Siegenthaler-Kaestner Esker State Nature Preserve |
|
| Clark |
| Buck Creek State Park |
| C.J. Brown Reservoir Wildlife Area |
| Clark Lake Wildlife Area |
| Snyder Park Scenic Area |
|
|
| Clermont |
| Cincinnati Nature Center $ on Saturday and Sunday |
| Crooked Run Robert J Paul State Nature Preserve |
| East Fork Lake Wildlife Area |
| East Fork State Park |
| Little Miami River State Park |
| Public Fossil Collecting Area -Stonelick State Park |
| Stonelick State Park |
|
| Clinton |
| Caesar Creek State Park |
| Cowan Lake State Park |
| Cowan Lake Wildlife Area |
| Culberson (Dean A) State Nature Preserve |
| Public Fossil Collecting Area - Cowan Lake |
|
| Darke |
| Drew Woods State Nature Preserve |
|
| Fayette |
| Deer Creek State Park |
|
|
| Franklin |
| Bergstresser Covered Bridge |
| Clear Creek (Allen F. Beck State Nature Preserve |
| Fairgrounds Covered Bridge |
| Gahanna Woods State Nature Preserve |
| Griggs Reservoir and Dam Scenic Area |
| Hayden Run Falls Scenic Area |
| Homestead Covered Bridge |
| Hoover Reservoir Wildlife Area |
| Hutchins (Highbanks) State Nature Preserve/Archeaology |
| Ohio Historical Center $ |
| Pickerington Ponds State Nature Preserve |
| Thomas (Edward S) State Nature Preserve |
|
| Greene |
| Caesar Creek State Park |
| Clifton Gorge State Nature Preserve |
| Glen Helen Archeological Site (Antioch College) |
| John Bryan State Park |
| Little Miami River State Park |
| Spring Valley Wildlife Area |
| Travertine Fen State Nature Preserve |
| Zimmerman Prairie Preserve |
|
| Hamilton |
| Cincinnati Museum of Natural History $ |
| Greenbelt State Nature Preserve |
| Little Miami River State Park |
| Miami Whitewater Forest Scenic Area $ |
| National Champion Big Tree: American Yellowwood |
| National Champion Big Tree: Shingle Oak |
| National Champion Big Tree: Two=Wing Silverbell |
| Newberry State Nature Preserve |
| Sharon Woods $ |
| Sharon Woods Gorge State Nature Preserve |
| Shawnee Lookout Archeaology Site $ |
| Winton Woods $ |
|
| Highland |
| Barrett's Mill |
| Brush Creek State Forest |
| Etawah Woods State Nature Preserve |
| Fallsville State Wildlife Area |
| Fort Hill State Memorial Archeaology Site $ |
| Miller Sanctuary Natural Bridge |
| Miller Sancturary Arch |
| Miller State Nature Preserve |
| Paint Creek State Park & Wildlife Area |
| Pike State Forest |
| Rocky Fork State Park & Wildlife Area |
| Seven Caves $ |
| Spring Creek Natural Arch |
| The Keyhole Natural Arch |
|
| Madison |
| Bigelow Cemetery Prairie State Nature Preserve |
| Madison Lake State Park |
| Smith Cemetery State Nature Preserve |
|
| Miami |
| Charleston Falls Preserve |
| Eldean Covered Bridge |
| Fletcher Covered Bridge |
| Goode Prairie |
| Greenville Falls Arch |
| Greenville Falls State Nature Preserve |
| Ludlow Falls Scenic Area |
| Overlook Falls Scenic Area |
|
| Montgomery |
| Boonshoft Museum of Discovery $ (Kids love it!) |
| Englewood Reserve |
| Germantown Reserve |
| Huffman Reserve |
| Sycamore State Park |
| Taylorsville Reserve |
|
| Pickaway |
| A W Martin State Park |
| Deer Creek State Park |
| Deer Creek Wildlife Area |
| Stage's Pond State Nature Preserve |
|
| Pike |
| Brush Creek State Forest |
| Cave Lake Park Scenic Area |
| Lake White State Park |
| Pike Lake State Park |
| Pike State Forest |
| Scioto Trail State Forest |
| Strait Creek Prairie Bluff State Nature Preserve |
|
| Preble |
| Acton Lake Wildlife Area |
| Fort St. Clair State Memorial |
| Hueston Woods State Nature Preserve |
| Hueston Woods State Park |
| Public Fossil Collecting Area - Hueston Woods |
| Rush Run State Wildlife Area |
|
| Ross |
| Copperas Mountain Scenic Area |
| Great Seal State Park |
| Hopewell Culture National Historical Park/Archeaology |
| National Champion Big Tree: Siberian Elm |
| Paint Creek State Park |
| Ross Lake Wildlife |
| Scioto Trail State Forest |
| Scioto Trail State Park |
| Selp Mound Archeaology Site $ |
| Tar Hollow State Forest |
| Tar Hollow State Park |
| Trimmer Arch |
|
| Scioto |
| Brush Creek State Forest |
| National Champion Big Tree: Common Persimmon |
| National Champion Big Tree: Oriental Arborvitae |
| Ohio State University Octon Museum |
| Raven Rock Arch State Nature Preserve |
| Shawnee State Forest |
| Shawnee State Park |
|
| Warren |
| Caesar Creek Gorge State Nature Preserve |
| Caesar Creek Public Fossil Collecting Area |
| Caesar Creek State Park |
| Fort Ancient |
| Halls Creek Woods State Nature Preserve |
| Little Miami River State Park |
