Not all unsafe trail conditions may be listed.
- Black Hawk County Conservation - 319-433-7275 (Including Brandon and La Porte City)
- Cedar Falls - 319-273-8629
- Waterloo - 319-291-4370 (press 1 for Parks)
- George Wyth State Park - 319-232-5505
- Evansdale - 319-232-6683
- Hudson - 319-988-3600