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

Distance from Grass Range, MT to Topock, AZ

Distance

1,150 mi

Time

20 hours 47 mins

Gas Cost

$107 - $208

There are 896.68 miles from Grass Range to Topock in southwest direction and 1,150 miles (1,850.75 kilometers) by car, following the I-15 route.

Grass Range and Topock are 20 hours 47 mins far apart, if you drive non-stop .

This is the fastest route from Grass Range, MT to Topock, AZ. The halfway point is Ogden, UT.

Please note the time difference between Grass Range, MT and Topock, AZ is 1 hour. The current time in Grass Range is 7:23 am and the current time in Topock is 6:23 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 Topock, AZ? 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 46.17 gallons of gas to cover the route between Grass Range, MT and Topock, AZ.

The estimated cost of gas to go from Grass Range to Topock is $150.60.

During the route, an average car will release 904.52 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 Topock, AZ

If you want to meet halfway between Grass Range, MT and Topock, AZ or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 41.240269 and -112.003349, or 41º 14' 24.9684" N, 112º 0' 12.0564" W. This location is 574.79 miles away from Grass Range, MT and Topock, AZ and it would take approximately 10 hours 23 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest city to the halfway point is Ogden, UT, situated 571 miles from Grass Range, MT and 585 miles from Topock, AZ. It would take 10 hours 11 mins to go from Grass Range to Ogden and 8 hours 30 mins to go from Topock to Ogden.