Buffalo, WY to Spearfish, SD: Ultimate Road Trip Guide

The route from Buffalo, WY to Spearfish, SD spans roughly 120 miles along Interstate 90 and US Highway 14/16, crossing the Powder River Basin and ascending into the Black Hills. This corridor boasts the only tunnel on the interstate system in Wyoming—the 1,800-foot-long Whitney Tunnel at mile marker 35.

The total drive typically takes 1 hour 50 minutes without stops, but plan for 2–3 hours to enjoy the sights. The route is well-served by truck stops and rest areas, making it a stress-free journey.

This drive is is it worth driving Buffalo, WY to Spearfish, SD? Absolutely—the scenery shifts from high plains to pine-clad mountains. How long to drive Buffalo, WY to Spearfish, SD? Expect 1 hour 50 minutes of pure driving, but factor in rest breaks.

• Fuel: Prices from Buffalo to Spearfish are about $3.10–$3.60 per gallon; fill up in Gillette for lower costs.
• Road Quality: I-90 is well-paved, with occasional winter slush; US 14/16 through Bear Lodge Mountains is narrower but scenic.
• Rest Areas: Full-service rest areas at mile markers 48 (near Gillette) and 199 (near Sundance) with picnic tables.

The route is also a gateway to how to find the best stops and hidden gems between cities—use the Wayro guide to plan your side trips.

Infrastructure safety is solid, with clear signage and patrol coverage. Winter can be treacherous, so check weather alerts. Family-friendly stops include the Civilian Conservation Corps-built picnic areas and the Bear Nation Museum in Upton.

Pet-friendly framework: Most rest areas have pet exercise areas, and many motels in Gillette and Sundance welcome pets—confirm before booking.

Fatigue management: Use the 20-minute rule, pull over at the Upton rest area (mile marker 139) or the Aladdin Store, a historic general store with free Wi-Fi and coffee.

Hidden off-route spots include the eerie ghosts of Arvada, an abandoned town, and the lush Spearfish Canyon Scenic Byway just south of Spearfish, perfect for a short detour.

The best stops Buffalo, WY to Spearfish, SD include Devil's Tower National Monument, a UNESCO World Heritage Site just north of Sundance, and Keyhole State Park, a boating and fishing hotspot. The geology here features the famous Black Hills granite and sedimentary Badlands formations.

Things to do between Buffalo, WY and Spearfish, SD: hike the Red Beds Trail at Devil's Tower, visit the Vore Buffalo Jump archaeological site, or see the Wyoming Dinosaur Center in Sundance. Local commerce thrives with family-run diners like the Sundance Diner and artisan shops in downtown Spearfish.

The climate is semi-arid, with annual rainfall under 15 inches in Buffalo and twice that in the Black Hills. This influences the aesthetic: golden prairie grasslands give way to ponderosa pine forests and colorful canyon walls.