Distance between cities › USA › Montana › Boulder, MT › Distance from Boulder to Ashley Book Hotels

Distance from Boulder, MT to Ashley, IL

Distance

1,559 mi

Time

1 day 3 hours

Gas Cost

$145 - $282

There are 1,287.01 miles from Boulder to Ashley in southeast direction and 1,559 miles (2,508.97 kilometers) by car, following the I-29 route.

Boulder and Ashley are 1 day 3 hours far apart, if you drive non-stop .

This is the fastest route from Boulder, MT to Ashley, IL. The halfway point is Kennebec, SD.

Please note the time difference between Boulder, MT and Ashley, IL is 1 hour. The current time in Boulder is 12:02 am and the current time in Ashley is 1:02 am.

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Lowest Price Rental Cars in Boulder, MT

Planning on renting a car to go from Boulder, MT to Ashley, IL? Here there are some offers to rent a car in Boulder, MT

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Boulder »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 62.59 gallons of gas to cover the route between Boulder, MT and Ashley, IL.

The estimated cost of gas to go from Boulder to Ashley is $204.18.

During the route, an average car will release 1,226.30 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 Boulder, MT and Ashley, IL

If you want to meet halfway between Boulder, MT and Ashley, IL or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 43.881660 and -99.842911, or 43º 52' 53.976" N, 99º 50' 34.4796" W. This location is 779.27 miles away from Boulder, MT and Ashley, IL and it would take approximately 13 hours 54 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Kennebec, SD, situated 775 miles from Boulder, MT and 840 miles from Ashley, IL. It would take 11 hours 40 mins to go from Boulder to Kennebec and 12 hours 9 mins to go from Ashley to Kennebec.