Buffalo WY to Dillon MT: Epic Road Trip Guide

Driving from Buffalo, Wyoming to Dillon, Montana covers 485 miles on I-90 and I-94, typically taking 7.5 hours without stops. The route crosses the Continental Divide at 7,000 feet, a threshold that divides the Missouri and Colorado River watersheds.

The Bighorn Mountains dominate the first hour, transitioning to the Yellowstone River Valley near Big Timber. The route passes within 30 miles of Pompeys Pillar National Monument, where William Clark carved his name in 1806.

Locals trade and sell handmade crafts at weekend farmers markets in Bozeman, while Dillon’s Main Street features century-old brick buildings housing artisan coffee shops.

Wildlife crossings are frequent near dawn and dusk, especially along the Gravelly Range, so scan the shoulders. The route includes three designated rest zones with shade structures and pet areas.

For families, the Museum of the Rockies in Bozeman showcases dinosaur fossils, and children can participate in dig pits. Dogs are welcome at most rest stops and at brewery patios in Livingston and Dillon.

To combat fatigue, plan to switch drivers every two hours or take a 15-minute break; you can find the how to find the best stops and hidden gems between cities.

Fuel costs along this route average $3.50 per gallon, making a full tank in Buffalo (at $50) adequate to reach Billings, where prices drop by 10%. The route is entirely interstate, with road quality rated A+ by the DOT, and winter closures are rare thanks to snow fences and cindering.

• I-90 west passes through Sheridan, WY, then joins I-94 at Billings.
• I-94 continues west to Bozeman, then US-287 south to Dillon.
• Rest areas every 30–50 miles offer picnic tables and restrooms.