Rugged wooded hills and valleys abundant with oak trees makes Nine Eagles one of southern Iowa's most scenic parks. The park has some trees which are more than 300 years old. Visitors enjoy six miles of bridle and nine miles of hiking trails, swimming at the sandy beach, pleasant camping areas and shaded picnic spots with tables and fireplaces scattered throughout the 1,100-acre park.

Plants native to the area flourish and provide excellent cover for birds and wildlife. White-tailed deer can be seen almost every morning and evening along the park roads. Waterfowl are a common sight along the lakeshore.

Located in Decatur County, the area now known as Nine Eagles was originally prairie and forest land. Indigenous peoples inhabited this region before European settlers arrived for farming and hunting purposes. The park's establishment dates back to 1935 when it began development under the Civilian Conservation Corps (CCC).

The CCC constructed several features including a dam that created a lake within the park boundaries which is central to its recreation offerings today. Post-CCC era saw continued use of surrounding lands primarily for agriculture.

Conservation efforts increased focus on preserving natural habitats while providing outdoor recreational opportunities such as camping, hiking, fishing, and boating. Historical aspects like remnants of early settler activity can still be found nearby.

In recent years there has been an emphasis on environmental stewardship with upgrades to facilities ensuring sustainability alongside visitor enjoyment; these include improved campgrounds and trails maintenance.

There are 3 campgrounds with 68 campsites (28 with electrical hookups), modern showers, rest rooms and a trailer dump station. Seven primitive equestrian campsites are offered and include fire rings and pit toilets. Starting February 13, 2006 advance campsite reservations can be booked through the park reservation system. Half of the campsites are still available for self-registration on a first-come, first-serve basis.