East Missoula, MT to Lockwood, MT is 347.4 miles and takes about 5h 43m via I 90, I 15, and Old Montana 200, with a fuel budget near $61 and enough daylight to finish in a day. This trip stays within Montana, traversing the Mountain West region. Expect a straightforward drive primarily on interstates, making it a good option for a single-day excursion. The route offers a practical way to cover ground efficiently between these two points.
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
173.7 miles from East Missoula, MT
A natural place for your longest stop of the day
, about 2h 48m into the drive
.
Main Roads
Road
Distance
Duration
I 90
235.1 mi
3h 49m
I 15
110.8 mi
1h 51m
Old Montana 200
0.5 mi
<1m
Johnson Lane
0.4 mi
<1m
Randles Street
0.1 mi
<1m
Longest stretch:
I 90
— 235.1 mi, about 3h 49m
Traffic on I-90
Hour-of-day weekday pattern from 28 FHWA count stations on your route.
Peak
4 PM
~706 veh/hr typical
· worst 885
Quietest
2 AM
~43 veh/hr
Peak-to-quiet ratio
16.4×
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 East Missoula, MT and Lockwood, MT.
1
Start on Randles Street
0.1 mi·31 sec·Randles Street
2
Turn left onto Old Montana 200
0.5 mi·58 sec·Old Montana 200
3
Take the ramp
0.3 mi·35 sec
4
Merge onto I 90; US 12; MT 200
113 mi·1 hr 47 min·I 90; US 12; MT 200
5
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.
6
Continue on I 90; US 89; US 191
6.9 mi·6 min·I 90; US 89; US 191
7
Continue on I 90; US 191
113 mi·1 hr 53 min·I 90; US 191
8
Continue on I 90; US 87; US 212
1.8 mi·2 min·I 90; US 87; US 212
9
Take the exit
0.3 mi·39 sec
Toward Johnson Lane
10
Turn left onto Johnson Lane
0.4 mi·46 sec·Johnson Lane
11
Arrive at destination
Johnson Lane
Trip Plan
This is a manageable one-day drive, so you can afford to leave mid-morning to avoid early rush hour and still arrive comfortably before dinner. Plan for one stop to break up the 5h 43m of driving time. Keep an eye on your fuel levels, especially during the 235.1-mile stretch on I 90, as services can be spread out in some sections. The budget for fuel is estimated at $61.
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 173.7 miles from East Missoula, MT, or about 2h 48m into the drive.
The longest continuous stretch on this route runs about 235.1 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 76 miles or 1h 13m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 173.7 miles or 2h 48m 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 42m
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 East Missoula, 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 East Missoula, MT
This is one driving day of about 347.4 miles and 5h 43m.
Your first comfortable stop window is around 76 miles from East Missoula, 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 90 for about 235.1 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 6
5 decision points cluster between mile 0.1 and 346.8 — 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|Old Montana 200
Turn left onto Old Montana 200
Navigation decision point
4
0.6 mi into trip|~1m in
Take the ramp
Navigation decision point
3
0.9 mi into trip|~2m in|I 90; US 12; MT 200
Merge onto I 90; US 12; MT 200
Merge point - match speed before joining
6
114.3 mi into trip|~1h 49m 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.
4
346.8 mi into trip|~5h 42m in
Take the exit toward Johnson Lane
Exit ramp - move to the correct lane early
Toward Johnson Lane
Fuel & Cost
Regular Gas
$54.15 one way
$108.30 round trip
$3.96/gal25.4 MPG avg122 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.17
$57.07
$114.15
premium
$4.47
$61.19
$122.38
diesel
$4.80
$65.60
$131.19
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$54
Meals
$25–$50
Total
$79–$104
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 121.5 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
104.2
1
$36.48
$16.68
Efficient EV
86.9
0
$30.40
$13.90
EV Truck/SUV
139
1
$48.64
$22.23
Gas CO2
122 kg
EV CO2
41 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
East Missoula, MT
Night
in East Missoula on Saturday
Local time
9:02 PM
MDT
Current temp
60°F
Mostly Clear
ESE 3 mph6% chanceLive forecast
Special Weather Statement
Special Weather Statement issued July 17 at 5:29AM MDT by NWS Missoula MT
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
Lockwood, MT
Night
in Lockwood on Saturday
Local time
9:02 PM
MDT
Current temp
65°F
Mostly Cloudy
SSW 3 mph0% chanceLive forecast
Special Weather Statement
Special Weather Statement issued July 17 at 5:29AM MDT by NWS Missoula MT
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
59°F
Whitehall, MT
174 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
5 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
5h 43m 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.
More Details
What kind of drive is this?
You'll be on the highway for 100% of this 347.4-mile drive. The longest continuous stretch you'll encounter is 235.1 miles on I 90. This means you'll experience extended periods of rural cruising without significant breaks in the interstate. Given the highway dominance, expect a steady pace with frequent, though perhaps not densely packed, exits.
100% highway — fuel and pacing are the main things to plan.
11 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 235.1 mi on I 90.
How Hard Is This Drive?
3/10
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 0.1 miles in near Old Montana 200.
Driving Effort3/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
This is a straightforward 5h 43m drive. You will face about 6 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 (Old Montana 200): Navigation decision point; at 0.6 miles: Navigation decision point; at 0.9 miles (I 90; US 12; MT 200): Merge point - match speed before joining.
The longest stretch is about 235.1 miles on I 90. The full list of main roads is in the Roads section above.
Yes — we found about 19 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.
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 19 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 (Old Montana 200): Navigation decision point; at 0.6 miles: Navigation decision point; at 0.9 miles (I 90; US 12; MT 200): Merge point - match speed before joining.
Not recommended in a single day. At 5.7 hours each way, a round trip means 11.5 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.
