Green Valley State Park is a state park of Iowa, USA, located in the bluffs and ravines adjacent to Lake Manawa. The park has many amenities for various activities. It contains two lakes; Lower and Upper Manawa Lakes. There is a campground at the south end of the park with tent sites, RV sites and horse campsites. To the north there are modern cabins that can be reserved for private events.
The park also features an equestrian entrance where horses may be rented to use on the trail or for sightseeing around the park. Two historic bridges, the Pony Bridge and Rock Point Bridge, carry scenic creeks over deep ravines, connecting the upper and lower sections of the park. A third bridge, carrying Big Creek across the East Fork of the Des Moines River, was removed in 2019. In 2020, work began to build a new Rock Point Bridge, which will be identical to the original except for being made from steel rather than wood.
Activities available within the park incude: