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

Distance from Grass Range, MT to Sun River, MT

Distance

159 mi

Time

3 hours 1 min

Gas Cost

$15 - $28

There are 141.10 miles from Grass Range to Sun River in northwest direction and 159 miles (255.89 kilometers) by car, following the US-87 and MT 3 and MT 200 route.

Grass Range and Sun River are 3 hours 1 min far apart, if you drive non-stop .

This is the fastest route from Grass Range, MT to Sun River, MT. The halfway point is Stanford, MT.

Grass Range, MT and Sun River, MT are in the same time zone (MDT). Current time in both locations is 12:22 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 Sun River, MT? 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 6.40 gallons of gas to cover the route between Grass Range, MT and Sun River, MT.

The estimated cost of gas to go from Grass Range to Sun River is $20.58.

During the route, an average car will release 125.47 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 $3.21 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 Sun River, MT

If you want to meet halfway between Grass Range, MT and Sun River, MT or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 47.166527 and -110.273216, or 47º 9' 59.4972" N, 110º 16' 23.5776" W. This location is 79.73 miles away from Grass Range, MT and Sun River, MT and it would take approximately 1 hour 30 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Stanford, MT, situated 78 miles from Grass Range, MT and 84 miles from Sun River, MT. It would take 1 hour 13 mins to go from Grass Range to Stanford and 1 hour 26 mins to go from Sun River to Stanford.