Spanning 312.5 miles across the Mountain West, this trip from Libby to Great Falls is a straightforward journey typically taking about 6 hours and 2 minutes. You will primarily navigate via Minnesota Avenue, US Route 2, and US 89. While it is feasible to complete this drive in a single day, the duration makes for a full day behind the wheel, so plan your schedule accordingly. Budget roughly $50 for fuel to cover the distance comfortably. Since both endpoints are located within Montana, you can expect a consistent regional feel as you transition across the state. This route offers a direct path, making it an efficient choice for those looking to connect these two Montana hubs without unnecessary detours.
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
156.2 miles from Libby, MT
A natural place for your longest stop of the day
, about 3h 3m into the drive
.
Main Roads
Road
Distance
Duration
Minnesota Avenue
85.3 mi
1h 35m
US Route 2
81.3 mi
1h 32m
US 89
76.4 mi
1h 26m
United States Route 89
16.8 mi
18m
1st Road Southeast
14.7 mi
15m
MT 206
9.7 mi
12m
First Special Service Force Memorial Highway
9.5 mi
8m
US 2
5.4 mi
8m
Longest stretch:
Minnesota Avenue
— 85.3 mi, about 1h 35m
Traffic on I-15
Hour-of-day weekday pattern from 4 FHWA count stations on your route.
Peak
5 PM
~391 veh/hr typical
· worst 507
Quietest
1 AM
~14 veh/hr
Peak-to-quiet ratio
27.9×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 52 weeks of 2023 FHWA Travel Monitoring Analysis System data. Weekday hours only (Mon–Fri).
Turn-by-Turn Driving Directions
Step-by-step road directions between Libby, MT and Great Falls, MT.
1
Start on US 2
0.4 mi·1 min·West 9th Street
2
Continue on US 2
85 mi·1 hr 35 min·Minnesota Avenue
3
Enter roundabout onto US 2
103 ft·1 sec·West Idaho Street
4
Continue on US 2
3.6 mi·7 min·West Idaho Street
Use the straight lane.
5
Continue on US 2
1.2 mi·2 min·US Route 2
Use the straight / right lanes.
6
Turn straight onto MT 35
2.4 mi·3 min·State Highway 35
Use the right lane.
7
Continue on MT 35
3.3 mi·4 min·MT 35
8
Turn left onto MT 206
9.7 mi·12 min·MT 206
Use the left lane.
9
At end of road, turn right onto US 2
1.7 mi·2 min·US 2
10
Continue on US 2
80 mi·1 hr 30 min·US Route 2
11
Enter roundabout onto US 2; US 89
24 ft·0 sec·US 2; US 89
12
Continue on US 2; US 89
3.7 mi·6 min·US 2; US 89
13
Turn straight onto US 89
68 mi·1 hr 16 min·US 89
14
Enter roundabout onto US 89
526 ft·19 sec·1st Street Southwest
15
Continue on US 89
107 ft·1 sec·1st Street Southwest
16
Turn straight onto US 89
0.7 mi·1 min·Main Avenue South
17
Continue on US 89
17 mi·18 min·United States Route 89
18
Continue on US 89
15 mi·15 min·1st Road Southeast
19
At end of road, turn left onto US 89; MT 200
7.9 mi·9 min·US 89; MT 200
20
Take the exit onto US 89; MT 200
0.3 mi·32 sec·US 89; MT 200
Toward I 15 South: Great Falls
21
Merge onto I 15; US 89; MT 200
9.5 mi·8 min·First Special Service Force Memorial Highway
22
Take the exit onto I 15 Business
0.2 mi·30 sec·I 15 Business
Toward I 15 Business
23
Turn left onto I 15 Business
1.5 mi·1 min·Central Avenue West
24
Continue on I 15 Business
0.2 mi·17 sec·First Avenue North Bridge
25
Continue on I 15 Business
0.5 mi·51 sec·1st Avenue North
26
Turn right onto I 15 Business
0.4 mi·36 sec·5th Street North
27
Turn right onto 4th Avenue South
429 ft·24 sec·4th Avenue South
28
Turn left onto 4th Street South
229 ft·10 sec·4th Street South
29
Arrive at destination
4th Street South
Trip Plan
Given the 6-hour drive time, aim to depart early in the morning to maximize your daylight hours on the road. You only have one planned stop in the data, so verify your fuel levels before heading out to ensure you stay within your $50 budget. Because this route relies heavily on major roads like US 89, traffic flow can be predictable, but be mindful of the significant distance covered in a single sitting. If you find the 312.5-mile stretch tiring, prioritize a mid-trip break to stretch your legs and reset. Staying aware of your fuel gauge during that initial 85.3-mile stretch on Minnesota Avenue is the best way to ensure a smooth, stress-free trip.
Morning Departure
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Evening Departure
This is a long drive — plan for a morning departure or consider splitting it into two days.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 156.2 miles from Libby, MT, or about 3h 3m into the drive.
The longest continuous stretch on this route runs about 85.3 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 69 miles or 1h 18m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 156.2 miles or 3h 3m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 4h 58m
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 Libby, 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 Libby, MT
This is one driving day of about 312.5 miles and 6h 2m.
Your first comfortable stop window is around 69 miles from Libby, 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 Minnesota Avenue for about 85.3 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 15
5 decision points cluster between mile 85.7 and 312.4 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
4
85.7 mi into trip|~1h 36m in|US 2 / West Idaho Street
Enter roundabout onto US 2 / West Idaho Street
Roundabout - know your exit number before entering
6
96.2 mi into trip|~1h 54m in|MT 206
Turn left onto MT 206
Lane positioning matters here
Use the left lane.
5
105.9 mi into trip|~2h 6m in|US 2
At end of road, turn right onto US 2
Navigation decision point
4
187.7 mi into trip|~3h 39m in|US 2; US 89
Enter roundabout onto US 2; US 89
Roundabout - know your exit number before entering
5
312.4 mi into trip|~6h 2m in|4th Street South
Turn left onto 4th Street South
Navigation decision point
Fuel & Cost
Regular Gas
$48.71 one way
$97.42 round trip
$3.96/gal25.4 MPG avg109 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.17
$51.34
$102.68
premium
$4.47
$55.04
$110.09
diesel
$4.80
$59.01
$118.01
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$49
Meals
$25–$50
Total
$74–$99
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 109.3 kg one way.
Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $33 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
93.8
1
$32.81
$15.00
Efficient EV
78.1
0
$27.34
$12.50
EV Truck/SUV
125
1
$43.75
$20.00
Gas CO2
109 kg
EV CO2
37 kg (66% less)
Plan for 1 charging stop. A 30-minute DC fast charge mid-route should be enough to complete the trip comfortably.
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 Jul 17, 2026
Origin
Libby, MT
Evening
in Libby on Saturday
Local time
8:31 PM
MDT
Current temp
98°F
Slight Chance Showers And Thunderstorms
NNW 2 mph19% chanceLive forecast
Flash Flood Watch
Flash Flood Watch issued July 17 at 12:23AM MDT until July 18 at 12:00AM MDT by NWS Great Falls MT
Destination
Great Falls, MT
Evening
in Great Falls on Saturday
Local time
8:31 PM
MDT
Current temp
97°F
Slight Chance Showers And Thunderstorms
E 3 to 8 mph19% chanceLive forecast
Flash Flood Watch
Flash Flood Watch issued July 17 at 12:23AM MDT until July 18 at 12:00AM MDT by NWS Great Falls MT
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
1 degrees cooler at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
6h 2m on the road
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
National Parks Near This Route
Worth a detour if your schedule allows.
Glacier National Park
National Park
A showcase of melting glaciers, alpine meadows, carved valleys, and spectacular lakes. With over 700 miles of trails, Glacier is a paradise for adventurous visitors seeking a landscape steeped in huma...
15 mi from route
~38 min detour
$35
near mile 129.3
Park Closure: Going-to-the-Sun Road Seasonal Closure
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This highway-focused drive balances longer stretches of open road with localized navigation. With 63% of the journey spent on highways, you should prepare for a steady pace throughout the trip. Your longest uninterrupted stretch occurs early on, covering 85.3 miles along Minnesota Avenue. As you transition from the initial stretches onto US Route 2 and US 89, the road character shifts, requiring you to remain alert for changes in road type. Expect a mix of driving environments that keep the experience engaging without being overly technical.
63% highway — fuel and pacing are the main things to plan.
29 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 85.3 mi on Minnesota Avenue.
How Hard Is This Drive?
3/10
This is a straightforward highway drive that stays mostly on Minnesota Avenue and US Route 2. There are only a few real navigation decisions along the way. The trickiest moment comes around 85.7 miles in near US 2 / West Idaho Street.
Driving Effort3/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
The route itself is not hard, but at 6h 2m, endurance matters. Plan breaks every 2-3 hours. The 15 decision points are all manageable with basic attention.
Where does it get tricky?
The main spots that need attention: at 85.7 miles (US 2 / West Idaho Street): Roundabout - know your exit number before entering; at 96.2 miles (MT 206): Lane positioning matters here; at 105.9 miles (US 2): 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.
Top landmarks
•Masonic Temple — masonic temple in Great Falls, United States of America
•Cascade County Courthouse — county courthouse in Great Falls, United States of America
•Chicago, Milwaukee and St. Paul Passenger Depot — railway station in Great Falls, the United States of America
The longest stretch is about 85.3 miles on Minnesota Avenue. The full list of main roads is in the Roads section above.
Yes — we found about 2 rest areas or service plazas within a short detour of the route (from OpenStreetMap). See the Rest Stops tab under Nearby Places for locations and mile markers. Plan to stretch, use the bathroom, and top off fluids every 2–3 hours on longer drives.
It helps. This is a long drive, so arriving tired and in the dark compounds. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Great Falls, MT before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 1 meaningful breaks. There are 2 rest areas along the route for bathroom stops.
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: at 85.7 miles (US 2 / West Idaho Street): Roundabout - know your exit number before entering; at 96.2 miles (MT 206): Lane positioning matters here; at 105.9 miles (US 2): Navigation decision point.
Yes — Glacier National Park. See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 6.0 hours each way, a round trip means 12.1 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Great Falls, MT before the return drive.
