Somers, MT to Lockwood, MT is 447.2 miles and takes about 7h 48m via I 90, I 15, and MT 83, with a fuel budget near $71 and enough daylight to finish in a day. This drive stays within Montana, traversing the Mountain West region for its entirety. It's a straightforward, mostly highway trip connecting two points in Big Sky Country. You'll be spending nearly all your time on major interstates, making it a functional transit route rather than a scenic tour. Plan for a single day of driving, as the duration is well within typical limits.
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
2 planned breaks
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
223.6 miles from Somers, MT
A natural place for your longest stop of the day
, about 4h 3m into the drive
.
Main Roads
Road
Distance
Duration
I 90
166.6 mi
2h 44m
I 15
110.8 mi
1h 51m
MT 83
91.1 mi
1h 43m
State Highway 141
32.5 mi
35m
MT 200
23.8 mi
25m
US 12
12.9 mi
14m
MT 82
5.7 mi
7m
Somers Road
1.3 mi
3m
Longest stretch:
I 90
— 166.6 mi, about 2h 44m
Traffic on I-90
Hour-of-day weekday pattern from 24 FHWA count stations on your route.
Peak
4 PM
~791 veh/hr typical
· worst 1,001
Quietest
2 AM
~46 veh/hr
Peak-to-quiet ratio
17.2×
busier at peak than in the quiet hours
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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 Somers, MT and Lockwood, MT.
1
Start on Somers Road
1.3 mi·3 min·Somers Road
2
Turn right onto MT 82
5.7 mi·7 min·MT 82
3
Turn right onto MT 35
0.3 mi·36 sec·MT 35
Use the straight lane.
4
Turn left onto MT 83
91 mi·1 hr 43 min·MT 83
Use the left lane.
5
Turn left onto MT 200
24 mi·25 min·MT 200
6
Turn right onto MT 141
32 mi·35 min·State Highway 141
7
Turn sharp right onto US 12
13 mi·14 min·US 12
8
Turn left
0.5 mi·42 sec
9
Continue on this road
0.2 mi·13 sec·this road
10
Take the ramp
0.9 mi·1 min
11
Merge onto I 90
45 mi·42 min·I 90
12
Keep slight right at fork onto I 15; I 90
111 mi·1 hr 51 min·I 15; I 90
Use the straight / slight right lanes.
13
Continue on I 90; US 89; US 191
6.9 mi·6 min·I 90; US 89; US 191
14
Continue on I 90; US 191
113 mi·1 hr 53 min·I 90; US 191
15
Continue on I 90; US 87; US 212
1.8 mi·2 min·I 90; US 87; US 212
16
Take the exit
0.3 mi·39 sec
Toward Johnson Lane
17
Turn left onto Johnson Lane
0.4 mi·46 sec·Johnson Lane
18
Arrive at destination
Johnson Lane
Trip Plan
To make the most of this 7h 48m drive, aim for an early morning departure from Somers. This allows you to cover the 166.6-mile stretch on I 90 with less traffic. With only two recommended stops, you can be strategic about when and where you refuel, keeping the $71 fuel cost in mind. Consider stopping around the halfway point to break up the drive. Since the entire trip is manageable in one day, you have flexibility; however, breaking it up with a longer lunch stop can make it more comfortable. The route is predominantly highway, so keep an eye on your fuel gauge as services can be spread out in Montana.
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 2 meaningful breaks for fuel, food, and rest.
The halfway point lands around 223.6 miles from Somers, MT, or about 4h 3m into the drive.
The longest continuous stretch on this route runs about 166.6 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 98 miles or 1h 54m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 223.6 miles or 4h 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 6h 47m
Traffic, exits, and arrival timing usually matter more near Lockwood, MT than in the middle of the route.
Before You Leave
+
Open the route before leaving Somers, 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.
+
Pick one backup stop option before the midpoint in case traffic changes your pacing.
Day 1
Settle into the route from Somers, MT
This is one driving day of about 447.2 miles and 7h 48m.
Your first comfortable stop window is around 98 miles from Somers, MT.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 2 real breaks rather than only quick fuel stops.
The longest stretch is on I 90 for about 166.6 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 11
5 decision points cluster between mile 1.3 and 214.2 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
4
1.3 mi into trip|~3m in|MT 82
Turn right onto MT 82
Navigation decision point
6
7 mi into trip|~10m in|MT 35
Turn right onto MT 35
Lane positioning matters here
Use the straight lane.
5
7.4 mi into trip|~10m in|MT 83
Turn left onto MT 83
Lane positioning matters here
Use the left lane.
5
154.8 mi into trip|~2h 55m in|US 12
Turn sharp right onto US 12
Sharp turn - reduce speed on approach
6
214.2 mi into trip|~3h 54m in|I 15; I 90
Keep slight right at fork onto I 15; I 90
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
Fuel & Cost
Regular Gas
$69.70 one way
$139.41 round trip
$3.96/gal25.4 MPG avg157 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.17
$73.47
$146.94
premium
$4.47
$78.77
$157.54
diesel
$4.80
$84.44
$168.88
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$70
Meals
$25–$50
Total
$95–$120
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 156.5 kg one way.
Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $47 in charging
· 1 stop
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
134.2
1
$46.96
$21.47
Efficient EV
111.8
1
$39.13
$17.89
EV Truck/SUV
178.9
2
$62.61
$28.62
Gas CO2
156 kg
EV CO2
52 kg (67% 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
Somers, MT
Evening
in Somers on Saturday
Local time
7:23 PM
MDT
Current temp
64°F
Chance Showers And Thunderstorms then Slight Chance Light Rain
NNW 3 mph36% chanceLive forecast
Severe Thunderstorm Warning
Severe Thunderstorm Warning issued July 16 at 6:25PM MDT until July 16 at 6:45PM MDT by NWS Billings MT
Special Weather Statement
Special Weather Statement issued July 16 at 6:21PM MDT by NWS Billings MT
Destination
Lockwood, MT
Evening
in Lockwood on Saturday
Local time
7:23 PM
MDT
Current temp
65°F
Chance Showers And Thunderstorms then Mostly Cloudy
NE 3 to 10 mph36% chanceLive forecast
Severe Thunderstorm Warning
Severe Thunderstorm Warning issued July 16 at 6:25PM MDT until July 16 at 6:45PM MDT by NWS Billings MT
Special Weather Statement
Special Weather Statement issued July 16 at 6:21PM MDT by NWS Billings 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 warmer at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
7h 48m 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?
You'll be on highways for 99% of this 447.2-mile drive. The longest continuous stretch on a major road is 166.6 miles, primarily on I 90. This means you can expect long periods of consistent cruising. The transition from highway to surface roads will be minimal, occurring only near your destination. The experience is largely rural, with the expected merges and exits associated with interstate travel.
99% highway — fuel and pacing are the main things to plan.
18 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 166.6 mi on I 90.
How Hard Is This Drive?
4/10
This is a straightforward highway drive that stays mostly on I 90 and I 15. There are only a few real navigation decisions along the way. The trickiest moment comes around 1.3 miles in near MT 82.
Driving Effort4/10
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 7h 48m, endurance matters. Plan breaks every 2-3 hours. The 11 decision points are all manageable with basic attention.
Where does it get tricky?
The main spots that need attention: at 1.3 miles (MT 82): Navigation decision point; at 7 miles (MT 35): Lane positioning matters here; at 7.4 miles (MT 83): Lane positioning matters here.
Elevation Profile
High-altitude sections with notable climbs
5,962 ft2,919 ft
Total Climb
3,537 ft
Total Descent
3,358 ft
Highest Point
5,962 ft
~223.6 mi in
Elevation Range
3,043 ft
Notable High Points
5,962 ft at ~223.6 miles+923 ft prominence
4,865 ft at ~319.5 miles+472 ft prominence
Detours Along the Way
Tagged by where each one fits in your drive — first break, midpoint, final stretch.
Kalispell is a town in Montana, near Glacier National Park. The name of the town means "flat land above the lake" in Salish, a Native American language. The population is about 23,000 (2016).
The longest stretch is about 166.6 miles on I 90. The full list of main roads is in the Roads section above.
Yes — we found about 16 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 Lockwood, 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 2 meaningful breaks. There are 16 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 1.3 miles (MT 82): Navigation decision point; at 7 miles (MT 35): Lane positioning matters here; at 7.4 miles (MT 83): Lane positioning matters here.
Not recommended in a single day. At 7.8 hours each way, a round trip means 15.6 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Lockwood, MT before the return drive.
