Big Creek State Park 
12397 NW 89th Court
Polk City, IA 50226
515-984-6473
http://www.iowadnr.gov/Destinations/StateParksRecAreas/IowasStateParks/ParkDetails.aspx?ParkID=610157&idAdminBoundary=173
State Park: Bike, Birding, Fish, Hike, Picnic, RV, Snow Sports, Walk, Water Sports
A 26-mile paved multi-use trail allows bicyclists and pedestrians to travel from the beach south through the Saylorville Lake area all the way to Des Moines. Thirteen miles of snowmobile trails provide winter recreational opportunities. Big Creek is also popular with cross-country skiers.