Road Trip Guide: Sioux Falls, SD to Oak Park, IL

Few road trips capture the slow transition from Great Plains to Midwestern woodlands like the 550-mile drive from Sioux Falls, South Dakota, to Oak Park, Illinois. The route roughly follows I-90 east to I-39 south, bisecting the Driftless Area—a region that escaped glaciation and boasts steep river valleys and limestone bluffs. At mile marker 230 on I-90, you'll cross the Mississippi River into Wisconsin, a moment marked by the sight of barges navigating the locks below.

This guide answers best stops Sioux Falls, SD to Oak Park, IL, helps you calculate how long to drive Sioux Falls, SD to Oak Park, IL (approximately 9 hours without stops), and explores is it worth driving Sioux Falls, SD to Oak Park, IL—absolutely, for the cultural and culinary contrasts alone. For a deeper dive into planning, check out how to find the best stops and hidden gems between cities.

The route passes through several distinct micro-regions, each with its own identity: the prairie remnants of eastern South Dakota, the corn-and-soy expanses of southern Minnesota and Wisconsin, and the forested valleys of northern Illinois. Oak Park itself, a leafy Chicago suburb, is famous for being the birthplace of Ernest Hemingway and home to the largest collection of Frank Lloyd Wright buildings in the world.

Eastern South Dakota surprises with the Palisades State Park (20 miles north of I-90, exit 406), featuring pink quartzite cliffs and a waterfall after rain. Further east, the Minnesota River Valley near New Ulm offers scenic overlooks and the Hermann Monument, a 102-foot tower commemorating a German poet.

Crossing into Wisconsin, the Driftless Area emerges with the Mississippi River Valley. Take a detour to the Great River Bluffs State Park (exit 199) for 360-degree views of the river winding through terraced hills. In La Crosse, visit the Riverside International Friendship Gardens—a series of themed gardens representing the city’s sister cities.

UNESCO World Heritage Sites: None directly on the route, but the Mound City Group part of Hopewell Ceremonial Earthworks in Chillicothe, OH, is a day’s detour. However, the Taliesin estate in Spring Green, WI (Frank Lloyd Wright’s home) is a UNESCO listed site and just 30 miles off I-90, making it a worthwhile off-route stop.

Local commerce thrives in small towns like Viroqua, WI, known for organic farms and the Driftless Café (farm-to-table dining). In Rockford, IL, the Anderson Japanese Gardens offer tranquility, while the Nicholas Conservatory & Gardens features a tropical atrium.

The primary artery is I-90, a well-maintained interstate with plenty of service areas. Fuel economy is optimal at 65 mph; expect gas prices to average $0.10 cheaper in South Dakota than in Illinois. Here’s a breakdown of typical fuel costs for a mid-size sedan:

• Sioux Falls to La Crosse: ~$45
• La Crosse to Oak Park: ~$55
• Total: ~$100 one-way

Rest stops are spaced every 30-40 miles. Notable ones include the Blue Earth Rest Area (MN, mile 156) featuring a giant Jolly Green Giant statue, and the Beloit Welcome Center (WI, mile 185) with clean facilities and travel brochures. For overnight stays, consider La Crosse or Rockford—both offer budget motels and mid-range hotels off the interstate.

Traffic is generally light except near Madison, WI, and the Chicago suburbs. Avoid I-90 through Rockford between 4-6 PM on weekdays. Toll roads: I-90 in Illinois is tolled from South Beloit to Chicago. Have exact change ($6.50) or an I-PASS transponder. Alternatively, take I-39 south to avoid most tolls but add 20 minutes.

I-90 is in excellent condition throughout, but watch for deer, especially at dawn and dusk in the driftless region. Winter driving (Nov-Mar) can bring snow and ice; check weather alerts and carry blankets. Cell coverage is reliable except for a 10-mile stretch near Albert Lea, MN.

Best stops for families: the Cascade Falls Park in Hiawatha, IA (exit 170) has a short boardwalk to a 40-foot waterfall. The Children’s Museum of La Crosse is an interactive wonderland. In Rockford, the Discovery Center Museum features hands-on science exhibits.

Pet-friendly framework: most rest stops have pet areas; the Beloit Welcome Center has a fenced dog run. Hotels like La Quinta and Motel 6 generally allow pets for a small fee. Carry a portable water bowl and keep dogs leashed in state parks.

Fatigue management and rest zones: The Albert Lea Rest Area (mile 143) is a 24-hour facility with vending machines. The Janesville Rest Area (mile 171) has picnic tables and a travel info center. Plan to stop every 2 hours. Caffeine? Try the Brewing Projekt in Eau Claire, WI (off I-94), a craft brewery with a taproom. For a quick nap, pull into a highway rest area—they are safe and well-lit.

Hidden off-route spots: House on the Rock in Spring Green, WI, is a bizarre attraction with the world’s largest carousel and a infinity room. Viroqua’s Driftless Books is a maze of used books in a former warehouse. In Illinois, Starved Rock State Park (off I-80) has stunning canyons and waterfalls—a 30-minute detour worth taking.