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Union Grove State Park

Union Grove State Park, established in 1938, is a picturesque outdoor destination in Tama County. The 110-acre Union Grove Lake is a focal point of the park, along with an often-photographed waterfall and dam nestled in the woods. Anglers enjoy fishing for crappie, bluegill, channel catfish, largemouth bass and walleyes, and visitors can hike, birdwatch or camp while enjoying the park.


Hike three miles of scenic trails, winding through diverse plant and wildlife habitats. Deer, turkey, songbirds and waterfowl are often spotted, and a beautiful re-established prairie and pine plantation can be found in the northeast corner of the park. Snowmobiling is a popular trail activity in the winter.

Boat in the waters of Union Grove Lake or swim at the unsupervised swimming beach. Two boat ramps, one near the beach and the other on the west side of the lake provide lake access; boats can be operated at “no wake” speeds. Anglers of all ages and experience will find abundant bluegill, bass, crappie and catfish. 24 hour fishing access is available from the inlet stream to the west shelter and along the face of the earthen dam.

Stay overnight in one of two modern family cabins or at the park’s modern campground. Both cabins are ADA accessible, and the campground contains full hookup sites, electric sites, modern restrooms and showers, and a dump station. One-fourth of the campsites are available on a first-come, first-serve basis and advance reservations can be made through the online reservation system for Union Grove State Park.

Reserve an open picnic shelter for an outdoor gathering during your visit. Numerous shaded picnic areas near the lake are available at Union Grove, and the shelter can be reserved through the online reservation system for Union Grove State Park.

Union Grove State Park
1215 220th Street
Gladbrook, IA 50635
Ph. 641-473-2556
Fax: 641-473-3059

LIMTED/HAZARDOUS ACCESS: Access to Union Grove State Park will be limted and/or hazardous during winter weather events. Routes will be plowed to access cabins as well as the west boat ramp for ice fishing access. Questions about this closure can be directed to the park office:, 641-473-2556. (01/05/2024)

FACILITY CLOSURE: Campground restroom and shower facility are closed for the season. RV dump station and water hydrants will remain on. Pit Latrines are avaliable in the Union Grove Campground. (10/16/23)


  • Hiking trails
  • Boat ramps (2)
  • Modern restrooms
  • Showers
  • Shelters ; ADA accessible
  • Modern family cabins ; ADA accessible
  • Full hook-up campsites
  • Buddy campsites
  • Dump station