Green Valley State Park 
1480 130th St.
Creston, IA 50801
641-782-5131
http://www.iowadnr.gov/Destinations/StateParksRecAreas/IowasStateParks/ParkDetails.aspx?ParkID=610106&idAdminBoundary=183
State Park: Bike, Birding, Camp, Fish, Hike, Picnic, Walk, Water Sports
A self-guided nature trail and multi-purpose trails, many bordering the lake, provide visitors excellent opportunities to investigate the 990-acre park and enjoy its wildlife and plants.