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

Distance from Grass Range, MT to Gray, IA

Distance

940 mi

Time

16 hours 56 mins

Gas Cost

$88 - $170

There are 768.85 miles from Grass Range to Gray in southeast direction and 940 miles (1,512.78 kilometers) by car, following the I-90 and US-14 and US-16 Truck and SD 79 route.

Grass Range and Gray are 16 hours 56 mins far apart, if you drive non-stop .

This is the fastest route from Grass Range, MT to Gray, IA.

Please note the time difference between Grass Range, MT and Gray, IA is 1 hour. The current time in Grass Range is 4:37 am and the current time in Gray is 5:37 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 Gray, IA? 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 37.77 gallons of gas to cover the route between Grass Range, MT and Gray, IA.

The estimated cost of gas to go from Grass Range to Gray is $123.19.

During the route, an average car will release 739.90 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 Gray, IA

If you want to meet halfway between Grass Range, MT and Gray, IA or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 43.904966 and -102.045909, or 43º 54' 17.8776" N, 102º 2' 45.2724" W. This location is 470.18 miles away from Grass Range, MT and Gray, IA and it would take approximately 8 hours 28 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Quinn, SD, situated 465 miles from Grass Range, MT and 484 miles from Gray, IA. It would take 8 hours 44 mins to go from Grass Range to Quinn and 8 hours 27 mins to go from Gray to Quinn.