Distance between cities › USA › Montana › Pray, MT › Distance from Pray to Big Arm Book Hotels

Distance from Pray, MT to Big Arm, MT

Distance

328 mi

Time

5 hours 48 mins

Gas Cost

$30 - $59

There are 239.41 miles from Pray to Big Arm in northwest direction and 328 miles (527.86 kilometers) by car, following the I-90 route.

Pray and Big Arm are 5 hours 48 mins far apart, if you drive non-stop .

This is the fastest route from Pray, MT to Big Arm, MT. The halfway point is Deer Lodge, MT.

Pray, MT and Big Arm, MT are in the same time zone (MDT). Current time in both locations is 2:41 am.

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Lowest Price Rental Cars in Pray, MT

Planning on renting a car to go from Pray, MT to Big Arm, MT? Here there are some offers to rent a car in Pray, MT

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Pray »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 13.16 gallons of gas to cover the route between Pray, MT and Big Arm, MT.

The estimated cost of gas to go from Pray to Big Arm is $42.44.

During the route, an average car will release 257.80 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 $3.23 per gallon of regular gas. Price last updated on March 13, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Pray, MT and Big Arm, MT

If you want to meet halfway between Pray, MT and Big Arm, MT or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 46.299339 and -112.745888, or 46º 17' 57.6204" N, 112º 44' 45.1968" W. This location is 163.82 miles away from Pray, MT and Big Arm, MT and it would take approximately 2 hours 54 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Deer Lodge, MT, situated 166 miles from Pray, MT and 162 miles from Big Arm, MT. It would take 2 hours 25 mins to go from Pray to Deer Lodge and 2 hours 44 mins to go from Big Arm to Deer Lodge.