Green Castle Recreation Area

116 1/2 acres area with a 16 acre lake now know as Green Castle Recreational Area. The rolling landscape of this area is painted with native prairie, evergreen trees, and hardwood trees. Green Castle has many day use facilities to offer including: three shelter houses (one reservable by contacting 641-752-5490), hiking trails, astronomy observatory, sand volleyball court, and a small wildlife exhibit. A comp ground with a showerhouse and dump station was added in 2025. All sites are on a first come/first serve basis. Canoes and kayaks are permitted.