Bismarck to Riverton Road Trip: Essential Stops and Guide

The drive from Bismarck, ND to Riverton, WY spans 531 miles across the Great Plains and Rocky Mountain foothills, following US-83 South, I-94 West, and US-20 West. This route traverses the historic Missouri River Valley and the southern edge of the Little Missouri National Grasslands, where you'll encounter stark badlands and sprawling ranches. One little-known fact: near the North Dakota-South Dakota border, US-83 crosses the Cannonball River at a point where Lewis and Clark once camped in 1804. The estimated driving time is 8 to 9 hours without stops, but you'll want to stretch it across two days to absorb the scenery.

This guide explores how long to drive Bismarck, ND to Riverton, WY, what are the best stops between these cities, and whether it's worth the journey. Spoiler: yes, especially for its geological contrasts and small-town charm. For more on finding hidden gems, check out how to find the best stops and hidden gems between cities.

Fuel stations are plentiful in Bismarck and along I-94 near Mandan and Dickinson, but become sparse once you turn south on US-85 toward the Wyoming border. Plan fuel stops in Bowman, ND (last reliable station before the border at US-85 and ND-12) and again in Newcastle, WY. The route economy benefits from a mostly flat terrain early on, yielding MPG in the high 20s for a typical sedan. Cellular coverage is good from Bismarck through Dickinson, but drops significantly between Hettinger, ND and Lusk, WY — download offline maps and podcasts.

• Fuel availability: Bismarck (many), Dickinson (several), Bowman (one), Newcastle (on US-16)
• Road quality: I-94 is excellent; US-85 from Bowman to Lusk is narrow two-lane with some chip seal
• Rest areas: I-94 West rest stops near exit 72 and 169; otherwise state rest areas at Belle Fourche and Lusk

For accommodations, consider a midway stop in Dickinson, ND (Day 1) then continue to Riverton. If you prefer a single long day, drive straight through with coffee stops at the Custer Battlefield Trading Post near I-94 and US-85 junction. Parking in Riverton is easy with free lots downtown. The easiest overnight option is in Newcastle or Lusk, WY.

The journey from Bismarck to Riverton takes you from the Missouri River's lush valley into the badlands of North Dakota, then the rolling plains of Wyoming. Short-grass prairie gives way to sagebrush steppe as you cross the line. In the North Unit of Theodore Roosevelt National Park (a short detour from I-94 exit 32), you'll see petrified forests and bison herds. Local ranchers near Bowman produce bison jerky and sell it at roadside stands. The route passes through the heart of the Crow Indian Reservation near Hardin, MT, where Indian tacos at the Little Big Horn College cafe are a must.

• Theodore Roosevelt National Park North Unit: 4-hour detour, fee $30 per vehicle
• Painted Canyon Visitor Center (I-94 exit 32) for panoramic views
• Little Missouri River badlands: Eroded buttes and canyons visible from US-85
• Wyoming's Thunder Basin National Grassland: Open range with pronghorn antelope

Local commerce along US-85 includes the Little Missouri Saloon in Buffalo, SD, serving bison burgers, and the Rusty Bucket Café in Lusk, known for homemade pies. The cultural blend of Scandinavian and Native American influences appears in the cuisine: lefse and fry bread are common. Near Newcastle, stop at the Anna Miller Museum for pioneer artifacts.

Road safety on this route is generally high, but watch for deer at dawn and dusk, especially between Lusk and Newcastle. Rural stretches are mostly straight with few services, so keep a full tank and carry emergency water. For families, the best stops include the Dickinson Museum Center (interactive exhibits on dinosaurs and prairie life) and the Pioneer Auto Museum in Murdo, SD (slightly off-route but worth the 20-mile detour). Children will enjoy the petting zoo at the Custer Trail Ranch near Belle Fourche.

• Pet-friendly: Most motels in Dickingson and Newcastle accept dogs; rest areas have designated pet exercise areas
• Fatigue management: Stop every 2 hours at a rest area or small town; the 24-hour Sinclair station in Lusk has fresh coffee
• Emergency services: Hospitals in Dickinson, Hettinger, and Newcastle; limited between

Hidden off-route spots include the Enchanted Highway (a 32-mile stretch near Regent, ND, with giant scrap metal sculptures) and the Vore Buffalo Jump near Beulah, WY, a natural sinkhole used for bison hunting. These require short detours but add memorable photo stops. For fatigue management, the scenic viewpoint at the Powder River Pass (US-20) offers a place to stretch legs.