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

Distance from Boulder, MT to Alder, MT

Distance

105 mi

Time

2 hours 17 mins

Gas Cost

$10 - $19

There are 63.07 miles from Boulder to Alder in south direction and 105 miles (168.98 kilometers) by car, following the MT 41 route.

Boulder and Alder are 2 hours 17 mins far apart, if you drive non-stop .

This is the fastest route from Boulder, MT to Alder, MT. The halfway point is Whitehall, MT.

Boulder, MT and Alder, MT are in the same time zone (MDT). Current time in both locations is 9:31 pm.

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Lowest Price Rental Cars in Boulder, MT

Planning on renting a car to go from Boulder, MT to Alder, 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 4.21 gallons of gas to cover the route between Boulder, MT and Alder, MT.

The estimated cost of gas to go from Boulder to Alder is $13.52.

During the route, an average car will release 82.45 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 Alder, MT

If you want to meet halfway between Boulder, MT and Alder, MT or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 45.901497 and -112.218346, or 45º 54' 5.3892" N, 112º 13' 6.0456" W. This location is 52.40 miles away from Boulder, MT and Alder, MT and it would take approximately 1 hour 8 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Whitehall, MT, situated 59 miles from Boulder, MT and 47 miles from Alder, MT. It would take 1 hour to go from Boulder to Whitehall and 1 hour 14 mins to go from Alder to Whitehall.