| Difficulty | I-II |
| Length | 2.4 mi |
| Avg Gradient | n/a |
| Gauge | Ioway Creek at Ames, Ia |
| Flow Rate as of 1 hour | 272 cfslow runnable |
| Reach Info Last Updated | November 19, 2021 |
Onion Creek is a small stream with some fast turns, boulders, and a couple broken limestone ledges (riffles).
It is a tributary to Ioway Creek (where, in fact, the listed take-out for this reach lies), which is tributary to the Skunk River.
No trip reports yet.