Brainerd to Spearfish Road Trip: Route Guide

Crossing from the pine forests of Minnesota to the high plains of South Dakota, this 560-mile drive on I-94 and I-90 takes about 8.5 hours of pure driving time. The route passes through the Missouri River's glacial-carved valley, where the landscape shifts from lake country to prairie. Notably, the speed limit in South Dakota is 80 mph, the highest in the nation, which can shorten your actual travel time if conditions allow.

This guide helps you decide whether the journey is worth it, what to see, where to refuel, and how to keep everyone safe and entertained. We've packed in the must-know details, from climate quirks to family-friendly amenities.

I-94 handles the Minnesota stretch, then I-90 takes over from Sioux Falls westward. Expect around 10 toll-free interstates with plenty of exit services. As of 2024, gas prices along the route average about $3.20/gal in MN and $3.00 in SD, but fill up before the long, desolate stretch between Chamberlain and Wall—it's a known gas gap.

• Distance: 560 miles total, 8-9 hours drive time.
• Toll-free route on I-94 and I-90.
• Most exits have fuel within 5 miles.
• South Dakota doesn't have tolls, but watch for road construction in summer.

Rest areas are frequent, but the best amenities are at truck stops like Love's or Pilot, which offer showers and WiFi. For EV drivers, there are quick chargers in Alexandria, SD, and Rapid City. For road conditions, call 511 in each state or check their websites.

Overall road quality is good, but be prepared for occasional rough patches on rural stretches. In North Dakota, watch for strong crosswinds that can affect high-profile vehicles.

This route is well-suited for families: plenty of rest areas with playgrounds, kid-friendly museums, and attractions like the Corn Palace. Rest stops are typically safe, well-lit, and include picnic tables; some have indoor facilities. For pet owners, nearly all truck stops allow pets, and there are several off-leash dog parks in Sioux Falls and Rapid City. Always keep pets on a leash and never leave them in a hot car.

For fatigue, plan to stop every 2 hours or so. Key rest areas: St. Cloud, MN (Exit 178), Alexandria, MN (Exit 103), Brookings, SD (Exit 132), and Murdo, SD (Exit 191). Caffeine is available at most fuel stations, but better yet, take a 15-minute nap in a rest area.

Hidden off-route gems: Pipestone National Monument (off Hwy 23) features quarries used for sacred pipes. The Blue Mounds State Park in Luverne, MN, has a rare prairie landscape. Near Kadoka, SD, the Badlands' Door Trail offers a quick hike. These spots are less crowded than the main attractions.

To find more secret places, use this how to find the best stops and hidden gems between cities guide. Bring a paper map as a backup—cell service is spotty in rural areas.

The most dramatic scenery arrives after the Badlands, but early highlights include the Mississippi River crossing in St. Cloud and the glacial lakes near Alexandria. The landscape transitions from hardwood forests to tallgrass prairie near the South Dakota border, then into the Missouri River breaks—a rugged, canyon-like terrain.

Local commerce thrives in small towns like Pipestone, MN, known for its pipestone quarries. Near Wall, the famous Wall Drug offers a glimpse of roadside capitalism, but don't overlook the historic courthouses in towns like Mitchell, home to the Corn Palace.

UNESCO World Heritage Sites are not directly on the route, but nearby, the Frank Lloyd Wright architecture in Wisconsin and the Grand Canyon are too far. But the closest one is the Paleolithic art in France—so you'll need to skip that. For a dose of culture, the Crazy Horse Memorial near Custer is an ongoing mountain sculpture, and the Journey Museum in Rapid City showcases local history.

Climate varies dramatically: snow can hit Brainerd as early as October, while Spearfish can see 90°F in May. In winter, blizzards can close I-90 in South Dakota; in summer, thunderstorms may produce hail. The best time to drive is late spring or early fall for mild temperatures and fewer crowds.