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

Distance from Boulder, MT to Poplar, MT

Distance

458 mi

Time

8 hours 20 mins

Gas Cost

$42 - $82

There are 349.89 miles from Boulder to Poplar in northeast direction and 458 miles (737.08 kilometers) by car, following the US-2 route.

Boulder and Poplar are 8 hours 20 mins far apart, if you drive non-stop .

This is the fastest route from Boulder, MT to Poplar, MT. The halfway point is Grass Range, MT.

Boulder, MT and Poplar, MT are in the same time zone (MDT). Current time in both locations is 12:02 am.

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Lowest Price Rental Cars in Boulder, MT

Planning on renting a car to go from Boulder, MT to Poplar, 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 18.41 gallons of gas to cover the route between Boulder, MT and Poplar, MT.

The estimated cost of gas to go from Boulder to Poplar is $59.14.

During the route, an average car will release 360.62 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 Poplar, MT

If you want to meet halfway between Boulder, MT and Poplar, MT or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 47.051956 and -108.878036, or 47º 3' 7.0416" N, 108º 52' 40.9296" W. This location is 229.16 miles away from Boulder, MT and Poplar, MT and it would take approximately 4 hours 10 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Grass Range, MT, situated 254 miles from Boulder, MT and 231 miles from Poplar, MT. It would take 4 hours 12 mins to go from Boulder to Grass Range and 4 hours 5 mins to go from Poplar to Grass Range.