Distance between cities › USA › Montana › Grass Range, MT › Distance from Grass Range to Armstrong Book Hotels

Distance from Grass Range, MT to Armstrong, TX

Distance

1,760 mi

Time

1 day 7 hours

Gas Cost

$164 - $319

There are 1,512.73 miles from Grass Range to Armstrong in southeast direction and 1,760 miles (2,832.45 kilometers) by car, following the US-87 route.

Grass Range and Armstrong are 1 day 7 hours far apart, if you drive non-stop .

This is the fastest route from Grass Range, MT to Armstrong, TX.

Please note the time difference between Grass Range, MT and Armstrong, TX is 1 hour. The current time in Grass Range is 12:20 am and the current time in Armstrong is 1:20 am.

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Lowest Price Rental Cars in Grass Range, MT

Planning on renting a car to go from Grass Range, MT to Armstrong, TX? Here there are some offers to rent a car in Grass Range, MT

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Grass Range »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 70.70 gallons of gas to cover the route between Grass Range, MT and Armstrong, TX.

The estimated cost of gas to go from Grass Range to Armstrong is $230.63.

During the route, an average car will release 1,385.20 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 $3.26 per gallon of regular gas. Price last updated on March 12, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Grass Range, MT and Armstrong, TX

If you want to meet halfway between Grass Range, MT and Armstrong, TX or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 37.957112 and -102.612915, or 37º 57' 25.6032" N, 102º 36' 46.494" W. This location is 880.24 miles away from Grass Range, MT and Armstrong, TX and it would take approximately 15 hours 32 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Lamar, CO, situated 841 miles from Grass Range, MT and 920 miles from Armstrong, TX. It would take 14 hours 39 mins to go from Grass Range to Lamar and 16 hours 24 mins to go from Armstrong to Lamar.