Distance between cities › USA › Montana › Boulder, MT › Distance from Boulder to Dillon Book Hotels

Distance from Boulder, MT to Dillon, MT

Distance

103 mi

Time

1 hour 44 mins

Gas Cost

$9 - $18

There are 74.77 miles from Boulder to Dillon in southwest direction and 103 miles (165.76 kilometers) by car, following the I-15 route.

Boulder and Dillon are 1 hour 44 mins far apart, if you drive non-stop .

This is the fastest route from Boulder, MT to Dillon, MT. The halfway point is Ramsay, MT.

Boulder, MT and Dillon, MT are in the same time zone (MDT). Current time in both locations is 9:23 pm.

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Lowest Price Rental Cars in Boulder, MT

Planning on renting a car to go from Boulder, MT to Dillon, MT? Here there are some offers to rent a car in Boulder, MT

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Boulder »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 4.12 gallons of gas to cover the route between Boulder, MT and Dillon, MT.

The estimated cost of gas to go from Boulder to Dillon is $13.25.

During the route, an average car will release 80.78 pounds of CO₂ to the atmosphere. The carbon footprint would be 0.79 pounds of CO₂ per mile.

Average USA gas price used for calculation is $3.21 per gallon of regular gas. Price last updated on March 12, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Boulder, MT and Dillon, MT

If you want to meet halfway between Boulder, MT and Dillon, MT or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 45.957417 and -112.665070, or 45º 57' 26.7012" N, 112º 39' 54.252" W. This location is 51.33 miles away from Boulder, MT and Dillon, MT and it would take approximately 52 minutes to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Ramsay, MT, situated 47 miles from Boulder, MT and 61 miles from Dillon, MT. It would take 51 minutes to go from Boulder to Ramsay and 1 hour 9 mins to go from Dillon to Ramsay.