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

Distance from Boulder, MT to Harlem, MT

Distance

273 mi

Time

4 hours 49 mins

Gas Cost

$25 - $49

There are 222.56 miles from Boulder to Harlem in northeast direction and 273 miles (439.35 kilometers) by car, following the US-87 route.

Boulder and Harlem are 4 hours 49 mins far apart, if you drive non-stop .

This is the fastest route from Boulder, MT to Harlem, MT. The halfway point is Carter, MT.

Boulder, MT and Harlem, MT are in the same time zone (MDT). Current time in both locations is 12:01 am.

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Lowest Price Rental Cars in Boulder, MT

Planning on renting a car to go from Boulder, MT to Harlem, 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 10.98 gallons of gas to cover the route between Boulder, MT and Harlem, MT.

The estimated cost of gas to go from Boulder to Harlem is $35.29.

During the route, an average car will release 215.18 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 Harlem, MT

If you want to meet halfway between Boulder, MT and Harlem, MT or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 47.797443 and -110.910736, or 47º 47' 50.7948" N, 110º 54' 38.6496" W. This location is 136.74 miles away from Boulder, MT and Harlem, MT and it would take approximately 2 hours 24 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Carter, MT, situated 144 miles from Boulder, MT and 130 miles from Harlem, MT. It would take 2 hours 42 mins to go from Boulder to Carter and 3 hours 12 mins to go from Harlem to Carter.