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Ohio's Geological Walk Through Time

Nestled within the Natural Resources Park at the Ohio State Fairgrounds is an exhibit that offers a unique learning experience for anyone interested in Ohio’s natural history. The Geological Walk Through Time (or "Geo Walk") examines ancient natural materials that have shaped Ohio’s economy, agriculture, recreation, and even the arts. The Division of Geological Survey offers interactive Geo Walk tours to groups of all kinds, including schools, scouts, and environmental organizations.

The Geo Walk is a 286-feet-long walkway and includes:

  • The world’s largest geological map, showing all 88 Ohio counties, so visitors can learn about the geologic setting in their hometowns.
  • A variety of boulders and rock specimens from throughout the state that give visitors an opportunity to touch and examine fossils, crystals, and other features.
  • Samples of industrial minerals that have been important to the state economy.
  • Interpretive signs explaining when Ohio’s rocks formed and the significant roles and purposes they served.

Guided Tours Available

young students at Geo Walk
A Geo Walk tour led by an expert geologist offers an educational opportunity for students of all ages to learn about the earth sciences in a fun, interactive, outdoor environment.

Natural Resources Park

Ohio Expo Center & State Fair
717 E. 17th Avenue
Columbus, OH 43211
Get Directions

Audio Tour

Take a trip through Ohio’s geologic history on your own time with a Geo Walk audio tour, narrated by geologists Mac Swinford (Division Geological Survey, ret.) and Dale Gnidovec (Orton Geological Museum). Stream the audio tour by clicking the link below or right-click the media player to download the file.
Stream the Geo Walk Audio Tour  [M4A 52Mb] — Running time: Approx. 28 minutes