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

Distance from Grass Range, MT to Monroe, UT

Distance

780 mi

Time

14 hours 26 mins

Gas Cost

$73 - $141

There are 603.81 miles from Grass Range to Monroe in southwest direction and 780 miles (1,255.29 kilometers) by car, following the I-15 and US-20 route.

Grass Range and Monroe are 14 hours 26 mins far apart, if you drive non-stop .

This is the fastest route from Grass Range, MT to Monroe, UT.

Grass Range, MT and Monroe, UT are in the same time zone (MDT). Current time in both locations is 1:48 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 Monroe, UT? 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 31.31 gallons of gas to cover the route between Grass Range, MT and Monroe, UT.

The estimated cost of gas to go from Grass Range to Monroe is $102.14.

During the route, an average car will release 613.45 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 $3.26 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 Monroe, UT

If you want to meet halfway between Grass Range, MT and Monroe, UT or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 43.77808 and -111.830993, or 43º 46' 41.088" N, 111º 49' 51.5748" W. This location is 389.83 miles away from Grass Range, MT and Monroe, UT and it would take approximately 7 hours 13 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Rexburg, ID, situated 368 miles from Grass Range, MT and 413 miles from Monroe, UT. It would take 7 hours 26 mins to go from Grass Range to Rexburg and 7 hours 6 mins to go from Monroe to Rexburg.