This 155-mile drive from Butte to Great Falls, Montana, is a straightforward journey that can easily be completed in about 2 hours and 35 minutes. With a fuel cost estimated at $25, it's an economical option for a day trip, as there's no need to split it into multiple days. The route is primarily highway-focused, making for a predictable and efficient travel experience through the Mountain West region. You'll spend most of your time on I-15, so expect a consistent driving pace. This trip is ideal if you're looking for a quick and no-fuss transfer between two Montana cities.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Break Rhythm
1 planned break
A short stop every 2 to 3 hours is enough for this drive.
Midpoint
77.7 miles from Butte, MT
A natural place for your longest stop of the day
, about 1h 17m into the drive
.
Main Roads
Road
Distance
Duration
I 15
151.2 mi
2h 27m
Country Club Boulevard
1.4 mi
1m
10th Avenue South
0.7 mi
<1m
South Montana Street
0.4 mi
<1m
4th Street South
0.4 mi
1m
South Main Street
0.4 mi
<1m
I 15 BUS
0.4 mi
<1m
West Front Street
0.3 mi
<1m
Longest stretch:
I 15
— 151.2 mi, about 2h 27m
Turn-by-Turn Driving Directions
Step-by-step road directions between Butte, MT and Great Falls, MT.
1
Start on West Iron Street
70 ft·5 sec·West Iron Street
2
Turn right onto South Main Street
0.4 mi·45 sec·South Main Street
3
Turn right onto West Front Street
0.3 mi·29 sec·West Front Street
4
Turn left onto South Montana Street
0.4 mi·45 sec·South Montana Street
5
Turn left onto La Salle Street
292 ft·4 sec·La Salle Street
6
Take the ramp
0.2 mi·23 sec
7
Merge onto I 15; I 90
2.5 mi·2 min·I 15; I 90
8
Take the exit onto I 15
149 mi·2 hr 24 min·I 15
Exit 129Toward I 15 North: HelenaUse the straight / slight right lanes.
9
Take the exit onto I 15 BUS
0.4 mi·49 sec·I 15 BUS
Toward I 15 Business, US 89 South, MT 200 East
10
Continue on I 15 Bus; US 89; MT 3; MT 200; I 315
1.4 mi·1 min·Country Club Boulevard
11
Continue on I 15 Business; US 89; MT 3; MT 200
0.7 mi·57 sec·10th Avenue South
12
Turn left onto 4th Street South
0.4 mi·1 min·4th Street South
13
Arrive at destination
4th Street South
Trip Plan
Given the relatively short duration of 2 hours and 35 minutes, this drive from Butte to Great Falls is perfect for a single-day trip, offering flexibility in your departure time. You can easily start in the morning and arrive in Great Falls by midday. Since the longest stretch is over 150 miles on I-15, plan for your fuel stop before you get too far out of Butte, as services might be less frequent along the interstate itself. With only one recommended stop, you can choose to make it a quick break or enjoy a more leisurely pause.
Morning Departure
Leave by 9 AM and you'll arrive before lunch.
Evening Departure
Even a 4 PM departure gets you there before dark in summer.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 77.7 miles from Butte, MT, or about 1h 17m into the drive.
The longest continuous stretch on this route runs about 151.2 miles.
This is a comfortable same-day trip.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 34 miles or 34m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 77.7 miles or 1h 17m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 2h 5m
Traffic, exits, and arrival timing usually matter more near Great Falls, MT than in the middle of the route.
Before You Leave
+
Open the route before leaving Butte, MT so your first major turns are already loaded.
+
Leave with enough water and a charging cable within reach, not packed away.
+
Check your fuel range against the first long segment, especially if you are starting outside city service areas.
Day 1
Settle into the route from Butte, MT
This is one driving day of about 155.4 miles and 2h 35m.
Your first comfortable stop window is around 34 miles from Butte, MT.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 1 real break rather than only quick fuel stops.
The longest stretch is on I 15 for about 151.2 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 9
5 decision points cluster between mile 0 and 152.6 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
4
0 mi into trip|~0m in|South Main Street
Turn right onto South Main Street
Navigation decision point
4
0.4 mi into trip|~0m in|West Front Street
Turn right onto West Front Street
Navigation decision point
4
1.1 mi into trip|~2m in|La Salle Street
Turn left onto La Salle Street
Navigation decision point
7
3.8 mi into trip|~5m in|I 15
Take the exit onto I 15 toward I 15 North: Helena
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the straight / slight right lanes.
Exit 129
Toward I 15 North: Helena
5
152.6 mi into trip|~2h 30m in|I 15 BUS
Take the exit onto I 15 BUS toward I 15 Business, US 89 South, MT 200 East
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward I 15 Business, US 89 South, MT 200 East
Fuel & Cost
Regular Gas
$24.63 one way
$49.25 round trip
$4.03/gal25.4 MPG avg54 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.22
$25.81
$51.62
premium
$4.53
$27.72
$55.44
diesel
$5.61
$34.31
$68.62
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$25
Meals
$25–$50
Total
$50–$75
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 54.4 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $16 in charging
· 0 stops
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
46.6
0
$16.32
$7.46
Efficient EV
38.9
0
$13.60
$6.22
EV Truck/SUV
62.2
0
$21.76
$9.95
Gas CO2
54 kg
EV CO2
18 kg (67% less)
This trip is well within single-charge range for most EVs. No charging stops needed if you start fully charged.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Travel Intel
Current conditions at both ends of the drive.
Forecast as of Apr 15, 2026
Origin
Butte, MT
Evening
in Butte on Saturday
Local time
7:26 PM
MDT
Current temp
66°F
Unavailable
Live forecast
Destination
Great Falls, MT
Evening
in Great Falls on Saturday
Local time
7:26 PM
MDT
Current temp
68°F
Unavailable
Live forecast
Seasonal Notes
Summer travel usually means heavier construction, hotter rest stops, and busier weekend traffic around major cities.
Winter travel shortens daylight, so a route that looks manageable on paper can feel much longer after dark.
Holiday weekends tend to make both departure and arrival windows slower than the raw route time suggests.
Time zone
Same local time
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
2 degrees warmer at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
2h 35m on the road
Use the two city cards together: check the sky where you start, then compare it with the local time and temperature at arrival.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
More Details
What kind of drive is this?
Expect a highway-focused drive for 98% of this 155.4-mile journey. The personality of this route is largely defined by I-15, which forms the longest uninterrupted stretch of 151.2 miles. You'll experience a consistent, high-speed environment for the bulk of your travel time. While there are brief transitions onto Country Club Boulevard and 10th Avenue South, the dominant feel is that of an interstate cruise. This means minimal distractions and a steady pace, allowing you to cover ground efficiently.
98% highway — fuel and pacing are the main things to plan.
13 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 151.2 mi on I 15.
How Hard Is This Drive?
2/10
This is a straightforward highway drive that stays mostly on I 15 and Country Club Boulevard. Navigation is very simple - set it and forget it for most of the drive. The trickiest moment comes early in the drive near South Main Street.
Driving Effort2/10
Very easy - short and simple to drive
Balances navigation complexity with total wheel time.
The drive from Butte, MT to Great Falls, MT is easy. At 2h 35m with 98% highway, most drivers will find it relaxed and low-stress.
Where does it get tricky?
The main spots that need attention: near the start (South Main Street): Navigation decision point; at 0.4 miles (West Front Street): Navigation decision point; at 1.1 miles (La Salle Street): Navigation decision point.
Great Falls is a city in Central Montana. It is the third most populous city in Montana with approximately 60,000 people. It is the hub for commercial and financial dealings in the center of the state.
The longest stretch is about 151.2 miles on I 15. The full list of main roads is in the Roads section above.
Yes, with realistic expectations. Build in a stop roughly every 2 hours, have snacks and activities ready, and check the Nearby Places tabs for kid-friendly stops along the way.
Mostly yes along the main roads, but rural stretches through MT can have sparse or no coverage. Before you leave, download offline Google Maps or Apple Maps for the route, and consider downloading music or podcasts instead of streaming. If you depend on data for navigation, keep a paper backup of the turn-by-turn directions.
The main spots that need attention: near the start (South Main Street): Navigation decision point; at 0.4 miles (West Front Street): Navigation decision point; at 1.1 miles (La Salle Street): Navigation decision point.
Yes. A round trip is manageable in a single day if you plan a break at Great Falls, MT before heading back.
