Eugene T. Mahoney State Park is a public recreation area located on the Platte River, off Interstate 80, approximately four miles (6.4 km) east of Ashland, Nebraska.

The state park features lodging and conferencing facilities, an aquatic center, marina, multi-purpose trails, the Kountze Memorial Theater, multiple facilities for event rentals, and a 70-foot (21 m) observation tower overlooking the Platte River Valley.

[2] It was named after Eugene T. Mahoney, a former state senator and long-time director of the Nebraska Game and Parks Commission, who is credited with reversing the fortunes of the moribund state park system during his directorship.

Athletic facilities include an aquatic center, 18-hole disc golf course, tennis and basketball courts, softball fields, and sand volleyball.

[4] In 2018, the park added an outdoors high-ropes adventure course and a 42-foot climbing wall with auto- and top-rope belays and a bouldering structure in the activity center.