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

Distance from Grass Range, MT to Ault, CO

Distance

584 mi

Time

10 hours 21 mins

Gas Cost

$53 - $104

There are 489.17 miles from Grass Range to Ault in southeast direction and 584 miles (939.86 kilometers) by car, following the US-87 route.

Grass Range and Ault are 10 hours 21 mins far apart, if you drive non-stop .

This is the fastest route from Grass Range, MT to Ault, CO. The halfway point is Mayoworth, WY.

Grass Range, MT and Ault, CO are in the same time zone (MDT). Current time in both locations is 10:54 pm.

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Lowest Price Rental Cars in Grass Range, MT

Planning on renting a car to go from Grass Range, MT to Ault, CO? 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 23.45 gallons of gas to cover the route between Grass Range, MT and Ault, CO.

The estimated cost of gas to go from Grass Range to Ault is $75.12.

During the route, an average car will release 459.34 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 $3.20 per gallon of regular gas. Price last updated on March 11, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Grass Range, MT and Ault, CO

If you want to meet halfway between Grass Range, MT and Ault, CO or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 43.824131 and -106.654633, or 43º 49' 26.8716" N, 106º 39' 16.6788" W. This location is 291.89 miles away from Grass Range, MT and Ault, CO and it would take approximately 5 hours 10 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Mayoworth, WY, situated 311 miles from Grass Range, MT and 298 miles from Ault, CO. It would take 6 hours 10 mins to go from Grass Range to Mayoworth and 4 hours 53 mins to go from Ault to Mayoworth.