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Green Valley State Park sits in the rolling hills of Union County in southern Iowa, where nearly 1,000 acres of restored prairie, timber, and a 390-acre lake create one of the state’s most underrated outdoor destinations. With a 4.6-star rating from visitors, Green Valley delivers the kind of quiet, uncrowded experience that Iowa’s bigger-name parks can’t always match.

The lake is the centerpiece. Anglers come for channel catfish, largemouth bass, and crappie, with consistent catches through spring and fall. A concrete boat ramp handles motorized craft, while the sheltered coves reward kayakers and canoeists with calm water and shoreline wildlife. Swimming is available at the designated beach during summer months.

Trails wind through native prairie grasses and oak-hickory woodland, offering solid birding opportunities—watch for red-tailed hawks, eastern bluebirds, and the occasional bald eagle near the lake. Hunters use the public land during fall seasons for deer, turkey, and upland game.

The park’s campground includes both electric and non-electric sites, with modern restrooms and a dump station nearby. Sites along the lake’s eastern shore are the most popular, so reserve early for summer weekends. A few equestrian campsites also serve riders exploring the surrounding countryside.

Visit between late April and mid-October for the best conditions. Spring wildflower blooms across the prairie are genuinely impressive, and fall color along the timbered ridges rivals anything in southern Iowa.

Explore Nearby

• Roseman Covered Bridge — Covered Bridge in Iowa
• Jefferson Highway Heritage Byway — Scenic Byway in Iowa
• Covered Bridges Scenic Byway — Scenic Byway in Iowa
• Cutler–Donahoe Bridge — Covered Bridge in Iowa
• Lewis and Clark National Historic Trail — Public Land in Idaho