Lewistown, MT to Polson, MT is 340.5 miles and takes about 6h 31m via US 89 and US 93, with a fuel budget near $55 and enough daylight to finish in a day. This trip stays within Montana, connecting two points in the Mountain West region. Most of this route is highway driving, making it a relatively straightforward trip. You can expect to cover a significant distance efficiently on this route, so plan accordingly for a single-day adventure.
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
170.3 miles from Lewistown, MT
A natural place for your longest stop of the day
, about 3h 12m into the drive
.
Main Roads
Road
Distance
Duration
US 89
148.3 mi
2h 47m
US 87
83.6 mi
1h 30m
US 93
60.6 mi
1h 15m
US Highway 87
16.1 mi
17m
MT 200
13.8 mi
15m
First Special Service Force Memorial Highway
9.4 mi
9m
2nd Avenue North
4.3 mi
7m
Central Avenue West
1.4 mi
1m
Longest stretch:
US 89
— 148.3 mi, about 2h 47m
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 Lewistown, MT and Polson, MT.
1
Start on 6th Avenue South
395 ft·22 sec·6th Avenue South
2
Turn left onto US 87; MT 200
0.8 mi·2 min·West Main Street
3
Continue on US 87; MT 200
1.5 mi·2 min·US Highway 87
4
At end of road, turn left onto US 87; US 191; MT 200
15 mi·15 min·US Highway 87
5
Continue on US 87; MT 3; MT 200
64 mi·1 hr 9 min·US 87; MT 3; MT 200
6
Turn slight right
0.3 mi·20 sec
7
Enter roundabout
172 ft·2 sec
8
Continue
0.1 mi·7 sec
9
Continue on US 87; US 89; MT 3; MT 200
19 mi·20 min·US 87; US 89; MT 3; MT 200
10
Turn right onto US 87 Bypass
0.9 mi·1 min·57th Street South
11
Turn left onto 2nd Avenue North
4.3 mi·7 min·2nd Avenue North
12
At end of road, turn left onto I 15 Business
240 ft·4 sec·Park Drive North
13
Turn right onto I 15 Business
0.2 mi·23 sec·1st Avenue North
14
Continue on I 15 Business
0.2 mi·17 sec·First Avenue North Bridge
15
Continue on I 15 Business
1.4 mi·1 min·Central Avenue West
16
Take the exit onto I 15 Business
0.2 mi·32 sec·I 15 Business
17
Merge onto I 15; US 89; MT 200
9.4 mi·9 min·First Special Service Force Memorial Highway
18
Take the exit onto US 89; MT 200
148 mi·2 hr 47 min·US 89; MT 200
Exit 290
19
Keep slight right at fork onto MT 200
14 mi·15 min·MT 200
20
Take the exit onto US 93; MT 200
0.2 mi·24 sec·US 93; MT 200
Toward US 93 North, MT 200 West: Kalispell
21
Keep slight right at fork onto US 93; MT 200
60 mi·1 hr 14 min·US 93; MT 200
Toward US 93 North, MT 200 West: Kalispell
22
Turn left onto S-354
310 ft·6 sec·Main Street
23
Arrive at destination
S-354
Trip Plan
With a 6.5-hour estimated drive time, leaving Lewistown in the morning should allow you to reach Polson with daylight to spare. You'll only need one stop to break up the drive, so consider a midway point around the 148.3-mile mark on US 89 for fuel and a quick stretch. Keep an eye on your fuel gauge, especially during the longer highway segments, as services can be spread out in this region. Given the single-day nature of this trip, you have flexibility to depart when convenient, but an early start maximizes your options.
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 170.3 miles from Lewistown, MT, or about 3h 12m into the drive.
The longest continuous stretch on this route runs about 148.3 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 75 miles or 1h 23m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 170.3 miles or 3h 12m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 5h 17m
Traffic, exits, and arrival timing usually matter more near Polson, MT than in the middle of the route.
Before You Leave
+
Open the route before leaving Lewistown, 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 Lewistown, MT
This is one driving day of about 340.5 miles and 6h 31m.
Your first comfortable stop window is around 75 miles from Lewistown, 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 US 89 for about 148.3 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 13
5 decision points cluster between mile 0.1 and 280.1 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
4
0.1 mi into trip|~0m in|US 87; MT 200 / West Main Street
Turn left onto US 87; MT 200 / West Main Street
Navigation decision point
5
81.6 mi into trip|~1h 30m in
Enter roundabout
Roundabout - know your exit number before entering
5
106.3 mi into trip|~2h in|I 15 Business / Park Drive North
At end of road, turn left onto I 15 Business / Park Drive North
Navigation decision point
5
279.9 mi into trip|~5h 16m in|US 93; MT 200
Take the exit onto US 93; MT 200 toward US 93 North, MT 200 West: Kalispell
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward US 93 North, MT 200 West: Kalispell
6
280.1 mi into trip|~5h 16m in|US 93; MT 200
Keep slight right at fork onto US 93; MT 200 toward US 93 North, MT 200 West: Kalispell
Highway fork - watch signs carefully. Multiple destination signs - pick the right one
Toward US 93 North, MT 200 West: Kalispell
Fuel & Cost
Regular Gas
$53.07 one way
$106.14 round trip
$3.96/gal25.4 MPG avg119 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.17
$55.94
$111.88
premium
$4.47
$59.98
$119.95
diesel
$4.80
$64.29
$128.59
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$53
Meals
$25–$50
Total
$78–$103
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 119.1 kg one way.
Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $36 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
102.2
1
$35.75
$16.34
Efficient EV
85.1
0
$29.79
$13.62
EV Truck/SUV
136.2
1
$47.67
$21.79
Gas CO2
119 kg
EV CO2
40 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
Lewistown, MT
Night
in Lewistown on Saturday
Local time
9:08 PM
MDT
Current temp
90°F
Sunny
ESE 6 to 12 mph6% 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
Polson, MT
Night
in Polson on Saturday
Local time
9:08 PM
MDT
Current temp
93°F
Sunny then Slight Chance Showers And Thunderstorms
NNE 1 to 6 mph22% 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
3 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
6h 31m 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.
More Details
What kind of drive is this?
This route is predominantly highway, with 95% of the drive on paved roads. You'll encounter a longest stretch of 148.3 miles on US 89, so be prepared for extended periods of rural cruising. The transition to surface roads will occur near the end of your trip, but for the vast majority of your time behind the wheel, you'll be on main highways. Expect minimal interruptions for the bulk of the drive.
95% highway — fuel and pacing are the main things to plan.
23 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 148.3 mi on US 89.
How Hard Is This Drive?
5/10
This is a straightforward highway drive that stays mostly on US 89 and US 87. You will hit about 13 points where you need to pay attention to lane position or signs. The trickiest moment comes around 0.1 miles in near US 87; MT 200 / West Main Street.
Driving Effort5/10
Moderate - straightforward overall, but long enough or busy enough to require pacing
Balances navigation complexity with total wheel time.
This drive requires moderate attention. Across 340.5 miles you will encounter 13 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.
Where does it get tricky?
The main spots that need attention: at 0.1 miles (US 87; MT 200 / West Main Street): Navigation decision point; at 81.6 miles: Roundabout - know your exit number before entering; at 106.3 miles (I 15 Business / Park Drive North): Navigation decision point.
Doable as a same-day drive at 6h 31m. Total distance: 340.5 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
6h 31m drive, plan rest stops for pacing.
First-Time Driver
Mostly highway driving (95%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 148.3 miles on US 89. The full list of main roads is in the Roads section above.
Yes — we found about 10 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 Polson, 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 10 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 0.1 miles (US 87; MT 200 / West Main Street): Navigation decision point; at 81.6 miles: Roundabout - know your exit number before entering; at 106.3 miles (I 15 Business / Park Drive North): Navigation decision point.
Not recommended in a single day. At 6.5 hours each way, a round trip means 13.1 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Polson, MT before the return drive.
