Deer Lodge, MT to Havre, MT is 257.8 miles and takes about 4h 41m via US 12, with a fuel budget near $42 and enough daylight to finish in a day. This route stays within the Mountain West region, connecting two points in Montana. It's primarily a surface road experience, suggesting you'll be seeing more of the local landscape than high-speed interstate. With only one recommended stop and a manageable duration, this drive is well-suited for a single-day trip, offering a straightforward way to travel between these locations.
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
128.9 miles from Deer Lodge, MT
A natural place for your longest stop of the day
, about 2h 18m into the drive
.
Main Roads
Road
Distance
Duration
15th Street Northeast
107.3 mi
1h 58m
First Special Service Force Memorial Highway
85.6 mi
1h 22m
US 12
42 mi
47m
I 90 Business
8.7 mi
8m
US 2
3 mi
3m
West Custer Avenue
1.6 mi
3m
3rd Street Northwest
1.4 mi
1m
Central Avenue West
1.2 mi
1m
Longest stretch:
15th Street Northeast
— 107.3 mi, about 1h 58m
Traffic on I-15
Hour-of-day weekday pattern from 4 FHWA count stations on your route.
Peak
3 PM
~173 veh/hr typical
· worst 261
Quietest
1 AM
~9 veh/hr
Peak-to-quiet ratio
19.2×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 50 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 Deer Lodge, MT and Havre, MT.
1
Start on Saint Mary's Avenue
0.3 mi·1 min·Saint Mary's Avenue
2
Turn right onto I 90 Business
1.0 mi·1 min·Main Street
3
Continue on I 90 Business
0.5 mi·56 sec·North Interchange
4
Take the ramp onto I 90 Business
8.7 mi·8 min·I 90 Business
5
Take the exit
1.2 mi·2 min
Toward US 12 East: Helena, Garrison
6
At end of road, turn right onto US 12
42 mi·47 min·US 12
Use the straight / right lanes.
7
Turn left onto Henderson Street
1.0 mi·2 min·Henderson Street
Use the left lane.
8
Turn right onto West Custer Avenue
1.6 mi·3 min·West Custer Avenue
Use the straight / right lanes.
9
Continue on CR 430
0.5 mi·1 min·East Custer Avenue
Use the left / straight lanes.
10
Turn left
0.3 mi·43 sec
Toward I 15 North, US 287: Great FallsUse the left lane.
11
Merge onto I 15; US 287
86 mi·1 hr 22 min·First Special Service Force Memorial Highway
12
Take the exit
0.2 mi·30 sec
13
Keep slight right at fork
229 ft·5 sec
14
Merge onto I 15 Business
1.2 mi·1 min·Central Avenue West
15
Turn left onto 3rd Street Northwest
1.4 mi·1 min·3rd Street Northwest
16
Continue on Smelter Avenue Northeast
0.5 mi·45 sec·Smelter Avenue Northeast
17
Turn left onto Old Havre Highway
0.9 mi·1 min·Old Havre Highway
18
Turn left onto US 87
107 mi·1 hr 58 min·15th Street Northeast
19
Turn right onto US 2
3.0 mi·3 min·US 2
20
Turn right onto 1st Avenue
0.3 mi·1 min·1st Avenue
21
Turn right onto 5th Street
421 ft·20 sec·5th Street
22
Turn right onto Montana Avenue
161 ft·7 sec·Montana Avenue
23
Arrive at destination
Montana Avenue
Trip Plan
For this 4h 41m drive, consider an early morning departure from Deer Lodge, MT to maximize your daylight. The route has only one recommended stop, so plan your breaks accordingly, perhaps around the halfway point or when you feel the need to stretch. With a fuel cost estimated around $42, it's wise to top off your tank before leaving Deer Lodge, as services might be spaced out on the surface road sections. The longest stretch without a major change in road type is over 100 miles, so be prepared for sustained driving periods.
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 128.9 miles from Deer Lodge, MT, or about 2h 18m into the drive.
The longest continuous stretch on this route runs about 107.3 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 57 miles or 1h 8m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 128.9 miles or 2h 18m 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 48m
Traffic, exits, and arrival timing usually matter more near Havre, MT than in the middle of the route.
Before You Leave
+
Open the route before leaving Deer Lodge, 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 Deer Lodge, MT
This is one driving day of about 257.8 miles and 4h 41m.
Your first comfortable stop window is around 57 miles from Deer Lodge, 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 15th Street Northeast for about 107.3 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 14
5 decision points cluster between mile 10.5 and 56.8 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
5
10.5 mi into trip|~12m in
Take the exit toward US 12 East: Helena, Garrison
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward US 12 East: Helena, Garrison
7
11.8 mi into trip|~14m in|US 12
At end of road, turn right onto US 12
Lane positioning matters here
Use the straight / right lanes.
6
53.8 mi into trip|~1h 1m in|Henderson Street
Turn left onto Henderson Street
Lane positioning matters here
Use the left lane.
5
54.7 mi into trip|~1h 4m in|West Custer Avenue
Turn right onto West Custer Avenue
Lane positioning matters here
Use the straight / right lanes.
8
56.8 mi into trip|~1h 8m in
Turn left toward I 15 North, US 287: Great Falls
Lane positioning matters here. Multiple destination signs - pick the right one
Use the left lane.
Toward I 15 North, US 287: Great Falls
Fuel & Cost
Regular Gas
$40.18 one way
$80.36 round trip
$3.96/gal25.4 MPG avg90 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.17
$42.35
$84.71
premium
$4.47
$45.41
$90.82
diesel
$4.80
$48.68
$97.36
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$40
Meals
$25–$50
Total
$65–$90
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 90.2 kg one way.
Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $27 in charging
· 0 stops
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
77.3
0
$27.07
$12.37
Efficient EV
64.5
0
$22.56
$10.31
EV Truck/SUV
103.1
1
$36.09
$16.50
Gas CO2
90 kg
EV CO2
30 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.
Forecast as of Jul 18, 2026
Origin
Deer Lodge, MT
Late night
in Deer Lodge on Sunday
Local time
4:15 AM
MDT
Current temp
54°F
Mostly Clear
S 3 mph1% chanceLive forecast
Destination
Havre, MT
Late night
in Havre on Sunday
Local time
4:15 AM
MDT
Current temp
63°F
Showers And Thunderstorms Likely
E 7 mph60% chanceLive forecast
96°F
Cascade, MT
129 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
9 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 41m 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?
This drive involves 21% highway travel, with the majority of your time spent on surface roads. You'll encounter a longest stretch of 107.3 miles on 15th Street Northeast, which will likely feel like rural cruising. Expect to transition from highway driving on US 12 to these more local roads, offering a different pace and perspective.
Only 21% highway — the rest is turn-by-turn surface driving.
23 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 107.3 mi on 15th Street Northeast.
How Hard Is This Drive?
5/10
Expect a hands-on drive with frequent turns and local roads rather than long highway stretches. You will hit about 14 points where you need to pay attention to lane position or signs. The trickiest moment comes around 10.5 miles in.
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 257.8 miles you will encounter 14 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 10.5 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 11.8 miles (US 12): Lane positioning matters here; at 53.8 miles (Henderson Street): Lane positioning matters here.
Deer Lodge is a town in western Montana. About 3,000 people live there.
The Montana men's state prison has been here for a long time. The old prison complex, in the heart of town, is now the Old Prison Museum. A complex of other museums is scattered through the town center.
Doable as a same-day drive at 4h 41m. Total distance: 257.8 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
4h 41m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (21%). Some complex stretches to watch for.
Scenic Drive
Mostly surface roads route profile.
Frequently Asked Questions
The longest stretch is about 107.3 miles on 15th Street Northeast. The full list of main roads is in the Roads section above.
Yes — we found about 4 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.
Yes, with realistic expectations. Build in a stop roughly every 2 hours, have snacks and activities ready, and check the Nearby Places tabs for kid-friendly stops along the way.
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 10.5 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 11.8 miles (US 12): Lane positioning matters here; at 53.8 miles (Henderson Street): Lane positioning matters here.
Possible but tiring. At 4.7 hours each way, an in-and-out day trip would put you behind the wheel for 9.4 hours — manageable with a long break at Havre, MT, but most travelers stay overnight.
