Buffalo WY to Keystone SD: Top Stops & Scenic Drive Guide

The drive from Buffalo, Wyoming, to Keystone, South Dakota, follows the old Bozeman Trail and later the route of the Chicago, Burlington & Quincy Railroad. That legacy is visible at Fort Phil Kearny State Historic Site, where the 1866 Fetterman Fight occurred just south of Buffalo.

The modern journey covers roughly 320 miles (515 km) via Interstate 90, U.S. Route 14, and U.S. Route 16, typically taking 5 to 6 hours without stops. Yet the true value lies in venturing off the interstate to explore the Powder River Basin, the Bighorn Mountains, and the Black Hills.

Fuel and Route Economics

Fuel prices along this corridor tend to be 10-15% higher in small towns like Moorcroft or Hulett than in Buffalo or Gillette. As of 2024, gasoline costs around $3.20 per gallon in Wyoming and $3.15 in South Dakota, but filling up in Gillette, the region's energy hub, often saves a few cents per gallon.

Use fuel apps to compare prices, and note that stations close early in rural areas, especially on Sundays. Carry a reserve can if you plan to explore backroads.

Road Quality and Safety

Interstate 90 is a well-maintained, four-lane divided highway, but secondary routes like U.S. 14 and U.S. 16 are two-lane with slower speed limits. Winter travel can be treacherous; snowplows operate continuously, but whiteout conditions frequently close sections.

Cell service is spotty west of Gillette and near Devils Tower, so download offline maps. Wyoming and South Dakota both enforce strict DUI laws and hefty fines for speeding in construction zones.

• Check road conditions via Wyoming 511 and South Dakota 511 apps.
• Watch for livestock crossings on open range.

Family and Child Suitability

The route is generally family-friendly, with numerous picnic areas and rest stops. Devils Tower National Monument has a visitor center and wheelchair-accessible paths. In the Black Hills, Bear Country USA offers drive-through wildlife viewing, and Storybook Island in Rapid City provides free fairytale-themed playgrounds.

For a dose of history, the Adams Museum in Deadwood (open daily) delights children with gold mining exhibits and a petrified forest.

Pet-Friendly Framework

Many motels along I-90 accept pets, but always call ahead. National parks like Devils Tower require leashes and only allow dogs on paved trails. There are several pet-friendly parks in Gillette, including the Gillette Dog Park with separate areas for large and small dogs.

Rest stops often have designated pet areas, and numerous gas stations welcome pets on their patios. Carry water and waste bags.

Fatigue Management and Rest Zones

Wyoming rest areas are open year-round and include picnic tables and restrooms. The Powder River Rest Area, about 30 miles east of Buffalo, offers basic amenities.

Plan to stop every two hours; consider the six-hour drive as a full day with breaks. Notable rest stops: the I-90 Welcome Center at exit 391 near Sundance, and the Black Hills Visitor Information Center in Lead.

To beat drowsiness, rotate drivers, sip coffee, and use apps like Drivewyze to locate truck stops. Two recommended overnight points are Gillette (halfway) and Custer, SD (just before Keystone).

Hidden Off-Route Spots

A detour to the Bighorn Canyon National Recreation Area, south of Lovell, offers scenic cliffs and abundant wildlife. The historic town of Virginia City, Montana, though slightly off the direct route, showcases the gold rush era.

Closer to the route, the Clearmont Schoolhouse (built 1906) is a tiny museum on WY-16, and the McSherry Ranch near Kaycee has ancient petroglyphs. For a unique photo, stop at the Mule Creek Junction's old stage stop ruins.

More Stop Ideas

To curate your own list of attractions based on your interests, learn how to find the best stops and hidden gems between cities.

Remember to take your time; the journey is as rewarding as the destination. Is it worth driving Buffalo, WY to Keystone, SD? Absolutely, for the geological wonders and historic sites alone.

Geological Wonders

The route crosses the Bighorn Mountains, a granite uplift that rises to 13,000 feet, and passes near Devil's Tower, the United States' first national monument (established 1906). This volcanic plug is sacred to the Lakota and stands 867 feet tall, attracting climbers and photographers.

Further east, the Black Hills are heavily forested with Ponderosa pine, and the Needles Highway and Iron Mountain Road offer dramatic granite spires and tunnels. These scenic byways are a highlight of the journey.

UNESCO World Heritage Sites

Within a short detour from Keystone lies Mount Rushmore National Memorial, not a UNESCO site itself but part of the larger Black Hills region known for cultural significance. The nearest UNESCO World Heritage Site is Yellowstone National Park (designated 1978), which is about 500 miles west via I-90 and I-80.

However, the route passes near the Cache la Poudre River, which is not a heritage site either. For authentic heritage, consider visiting the Crazy Horse Memorial, though it's privately funded and not UNESCO listed.

Culinary Infrastructure

You'll find classic roadside diners and family-owned steakhouses in towns like Gillette, Sundance, and Newcastle. Local specialties include bison burgers, elk steaks, and fry bread at Native American-owned establishments.

In Keystone, the Goat Head Bar and Restaurant offers a lively atmosphere, while the Alpine Inn is known for its huge pork tenderloin sandwich. For breakfast, try the Stampede Café in Buffalo for homemade cinnamon rolls.

Local Commerce and Culture

Historic Main Street in Buffalo features the Occidental Hotel (1880), still operating as a bar and museum. Gillette's Campbell County Rockpile Museum showcases dinosaur fossils and local ranching history.

Small towns like Hulett and Aladdin have a genuine Wild West character, with century-old buildings and friendly locals. Don't miss the annual Buffalo Stampede Rodeo in July, which celebrates the region's cowboy heritage.