Lake Keomah is an 84-acre lake situated within a 366-acre state park near Oskaloosa in southern Iowa. The lake features two boat ramps for water access, and only electric motors are allowed on the water. The shoreline is characterized by deep woods and marshy areas, creating diverse wildlife viewing opportunities, particularly for blue herons and various bird species.

The lake will be unavailable for paddling starting July 2024 through spring 2026 due to a major renovation project to improve water quality and amenities. During normal operations, paddlers can expect a relatively peaceful experience, as the motor restrictions keep the water calm and suitable for canoes and kayaks.

The surrounding environment includes a mix of dense forest and wetlands, with fall bringing particularly vibrant colors to the trees and shrubs along the shoreline. A three-mile trail circles the lake, offering paddlers the opportunity to combine their water activities with shoreline exploration.

Lake Keomah has historical significance, with many of its facilities constructed by the Civilian Conservation Corps in the 1930s. The lake's name combines references to Keokuk and Mahaska counties. Facilities include an unsupervised swimming beach, picnic areas, and restrooms, though availability may be affected by ongoing renovation work.

Water quality has historically been good, with a 2015 report noting it was "the highest it's ever been." Wildlife observers may spot bullfrogs along the shoreline and various bird species in the wooded areas surrounding the lake. The lake is also a popular fishing destination, with populations of bluegill, crappie, and largemouth bass.

The park's location provides easy access from nearby communities including Oskaloosa, University Park, and Rose Hill, all within an hour's drive.