Boulder to Gillette: Road Trip Guide & Distance

How far is Boulder from Gillette?

The distance from Boulder to Gillette is 295.7 miles (475.9 km) as the crow flies. Gillette is located N of Boulder. By car, the driving distance is approximately 369.7 miles, taking about 7h 26min. A direct flight would take roughly 1h 6min. Both are located in United States — Boulder in Colorado and Gillette in Wyoming.

This is a solid day of driving. Be sure to take breaks every 2-3 hours to avoid driver fatigue, and plan your meals ahead of time.

Coordinates come from public place data for Boulder and Gillette. The driving distance is estimated from straight-line distance with a road-factor model, so confirm the route in your navigation app. Fuel, flight, bus, and train values are planning estimates and can change by date, provider, road closures, and border rules.