| Siegenthaler-Kaestner Esker State Nature Preserve | |
| Location: | Champaign County, Ohio |
| Nearest City: | West Liberty, Ohio |
| Coordinates: | 40.2281°N -83.8553°W |
| Area: | 37acres |
Siegenthaler-Kaestner Esker is a 37acres state nature preserve located in Champaign County, Ohio, United States. It contains an esker, kame, and kettle, all glacial landforms.
It is an example of a sinuous esker, an ancient ice-walled stream channel which flowed through a Wisconsinan glacier 11,000-25,000 years ago.[1]