Origin
Big Sky, MT
Morning in Big Sky on Saturday
Local time
6:17 AM
MDT
Current temp
34°F
Unavailable
Live forecast
Trip from Big Sky, MT to Great Falls, MT
Compiled and reviewed by the Trip.ovh planning team at COD Solutions Oy · Last reviewed Apr 18, 2026 · Editorial standards
Drive Time
4h 3m
Distance
222.8 mi
359 km
Drive Score
10/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$35
one way
EV Charging
Unknown
Best Time to Leave
4 AM
3h 51m
★
6 AM
4h 4m
8 AM
4h 30m
10 AM
4h 13m
12 PM
4h 10m
3 PM
4h 14m
5 PM
4h 28m
8 PM
3h 56m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Big Sky, MT
Alex Moliski
Great Falls, MT
Wikimedia Commons
Trip Overview
The drive from Big Sky, MT to Great Falls, MT covers 222.8 miles and takes about 4h 3m behind the wheel. This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on First Special Service Force Memorial Highway, Highway 287, Gallatin Road for much of the mileage, and the overall profile is mixed drive. The longest uninterrupted segment is about 86 miles on First Special Service Force Memorial Highway. At current regular gas prices, budget about $35.31 one way before food or hotel costs.
Trip Pace
Same-day drive is realistic
A same-day return is possible, but it will make for a full day on the road.
Break Rhythm
1 planned break
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
111.4 miles from Big Sky, MT
A natural place for your longest stop of the day , about 2h 9m into the drive .
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 4h 3m. Total distance: 222.8 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
4h 3m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (39%). Straightforward navigation.
Scenic Drive
Mixed drive route profile.
Drive Character
The drive from Big Sky, MT to Great Falls, MT covers 222.8 miles and takes about 4h 3m, using a mix of highways and local roads.
Expect a mix of faster highway mileage and slower local approaches near the beginning or end.
There are about 15 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
First Special Service Force Memorial Highway is the longest continuous segment at about 86 miles.
How Hard Is This Drive?
This route mixes highway mileage with some local-road sections near the start or finish. There are only a few real navigation decisions along the way. The trickiest moment comes around 0.1 miles in near MT 64 / Lone Mountain Trail.
Driving Effort
4/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
This is a straightforward 4h 3m drive. You will face about 10 decision points, but nothing that requires special attention if you follow navigation.
Where does it get tricky?
The main spots that need attention: at 0.1 miles (MT 64 / Lone Mountain Trail): Navigation decision point; at 71.1 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 71.4 miles (US 287 / Highway 287): Lane positioning matters here.
Critical Maneuvers
5 of 10 key pointsThese are the spots where you need to pay the most attention. Preview them before you drive.
4
0.1 mi into trip
|
~0m in
|
MT 64 / Lone Mountain Trail
Turn right onto MT 64 / Lone Mountain Trail
Navigation decision point
5
71.1 mi into trip
|
~1h 23m in
Take the exit toward US 287: Helena, Ennis
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward US 287: Helena, Ennis
5
71.4 mi into trip
|
~1h 24m in
|
US 287 / Highway 287
Turn right onto US 287 / Highway 287
Lane positioning matters here
Use the straight / right lanes.
5
134 mi into trip
|
~2h 35m in
|
I 15; US 287 / First Special Service Force Memorial Highway
Merge onto I 15; US 287 / First Special Service Force Memorial Highway
Merge point - match speed before joining. Lane positioning matters here
Use the slight right lane.
5
220 mi into trip
|
~3h 58m 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
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
On the drive from Big Sky, MT to Great Falls, MT, road signs begin pointing toward Ennis along the way.
Ennis
71.1 mi in
|
~1h 23m
Main Roads
| Road | Distance | Duration |
|---|---|---|
| First Special Service Force Memorial Highway | 86 mi | 1h 22m |
| Highway 287 | 62.2 mi | 1h 10m |
| Gallatin Road | 33.9 mi | 41m |
| I 90 | 23 mi | 22m |
| Lone Mountain Trail | 7.1 mi | 11m |
| Jackrabbit Lane | 6.8 mi | 7m |
| Country Club Boulevard | 1.4 mi | 1m |
| 10th Avenue South | 0.7 mi | <1m |
Longest stretch:
First Special Service Force Memorial Highway
— 86 mi, about 1h 22m
Turn-by-Turn Driving Directions
Step-by-step road directions between Big Sky, MT and Great Falls, MT.
1
Start on Access
0.1 mi
·
32 sec
·
Access
2
Turn right onto MT 64
7.1 mi
·
11 min
·
Lone Mountain Trail
3
At end of road, turn left onto US 191
34 mi
·
41 min
·
Gallatin Road
4
Continue on MT 85
6.8 mi
·
7 min
·
Jackrabbit Lane
5
Turn left
0.2 mi
·
30 sec
6
Merge onto I 90
23 mi
·
22 min
·
I 90
7
Take the exit
0.3 mi
·
37 sec
Toward US 287: Helena, Ennis
8
Turn right onto US 287
62 mi
·
1 hr 10 min
·
Highway 287
Use the straight / right lanes.
9
Take the exit onto US 287
0.4 mi
·
47 sec
·
US 287
Toward I 15 North: Great Falls
10
Merge onto I 15; US 287
86 mi
·
1 hr 22 min
·
First Special Service Force Memorial Highway
Use the slight right lane.
11
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
12
Continue on I 15 Bus; US 89; MT 3; MT 200; I 315
1.4 mi
·
1 min
·
Country Club Boulevard
13
Continue on I 15 Business; US 89; MT 3; MT 200
0.7 mi
·
57 sec
·
10th Avenue South
14
Turn left onto 4th Street South
0.4 mi
·
1 min
·
4th Street South
15
Arrive at destination
4th Street South
Trip Plan
Morning Departure
An early start around 7-8 AM gets you there with plenty of daylight left.
Evening Departure
A late afternoon start means arriving after dark. Morning is better.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 111.4 miles from Big Sky, MT, or about 2h 9m into the drive.
The longest continuous stretch on this route runs about 86 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 49 miles or 1h 1m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 111.4 miles or 2h 9m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 3h 22m
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 Big Sky, 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 Big Sky, MT
This is one driving day of about 222.8 miles and 4h 3m.
Your first comfortable stop window is around 49 miles from Big Sky, 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 First Special Service Force Memorial Highway for about 86 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 111.4 mi from Big Sky, MT · 2h 9m into the drive
Mid-route town
Meal stop
111 mi into the route
Best for: Lunch, fuel, and a longer reset
This sits close to the middle of the route, so it works well for the longest stop of the day.
Pacing Suggestions
Fuel and coffee
A short stop after about 49 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 111.4 miles from Big Sky, MT, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel checkTop up before First Special Service Force Memorial Highway if your tank is already low. That segment runs about 86 miles.
Arriving in Great Falls, MT
The final approach into Great Falls, MT usually feels slower than the middle of the drive, so avoid planning your tightest schedule at the very end.
Try to arrive with enough fuel left to skip an immediate station stop unless you already know the area around Great Falls, MT.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Fuel & Cost
Regular Gas
$35.31 one way
$70.61 round trip
$4.03/gal
25.4 MPG avg
78 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.22 | $37.01 | $74.02 |
| premium | $4.53 | $39.74 | $79.49 |
| diesel | $5.61 | $49.19 | $98.38 |
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$35
Meals
$25–$50
Total
$60–$85
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 78 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $23 in charging · 0 stops · 67% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 66.8 | 0 | $23.39 | $10.69 |
| Efficient EV | 55.7 | 0 | $19.50 | $8.91 |
| EV Truck/SUV | 89.1 | 1 | $31.19 | $14.26 |
Gas CO2
78 kg
EV CO2
26 kg (67% less)
Plan for 0 charging stops, roughly every 270 miles. Allow 25-40 minutes per stop at a DC fast charger.
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.
Destination
Great Falls, MT
Morning in Great Falls on Saturday
Local time
6:17 AM
MDT
Current temp
68°F
Unavailable
Live forecast
66°F
Belgrade, MT
111 mi in
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
34 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
4h 3m on the road
An early start around 7-8 AM gets you there with plenty of daylight left.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
Frequently Asked Questions
The drive from Big Sky, MT to Great Falls, MT covers 222.8 miles and takes about 4h 3m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are First Special Service Force Memorial Highway, Highway 287, Gallatin Road. Expect a mix of highway and local road driving.
This is a comfortable same-day trip.
The midpoint is about 111.4 miles from Big Sky, MT. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $35.31 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
An early start around 7-8 AM gets you there with plenty of daylight left. A late afternoon start means arriving after dark. Morning is better.
Plan about 1 meaningful break for fuel, food, or rest. Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
This is a straightforward 4h 3m drive. You will face about 10 decision points, but nothing that requires special attention if you follow navigation.
The main spots that need attention: at 0.1 miles (MT 64 / Lone Mountain Trail): Navigation decision point; at 71.1 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 71.4 miles (US 287 / Highway 287): Lane positioning matters here.
On the drive from Big Sky, MT to Great Falls, MT, road signs begin pointing toward Ennis along the way.
How this page is built
Compiled by the Trip.ovh planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, and EIA for fuel prices. See our methodology for refresh cadence and limitations.
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