Connecting Billings to Deer Lodge is a straightforward 262.9-mile journey that typically takes about 4 hours and 25 minutes. Because this route is entirely within the Mountain West region of Montana, you can expect consistent terrain and climate conditions throughout your trip. It is easily manageable as a single-day drive, requiring only one planned stop to keep you refreshed. Budgeting around $42 for fuel should cover your needs for this direct trek. Whether you are traveling for business or a change of scenery, the simplicity of this trip makes it a reliable choice for a one-day itinerary.
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
131.4 miles from Billings, MT
A natural place for your longest stop of the day
, about 2h 13m into the drive
.
Main Roads
Road
Distance
Duration
I 90
256.4 mi
4h 12m
I 90 Business
2.3 mi
3m
Montana Avenue
1.5 mi
2m
Laurel Road
1.4 mi
2m
1st Avenue North
0.9 mi
3m
Saint Mary's Avenue
0.3 mi
<1m
Division Street
<0.1 mi
<1m
North 23rd Street
<0.1 mi
<1m
Longest stretch:
I 90
— 256.4 mi, about 4h 12m
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
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 Billings, MT and Deer Lodge, MT.
1
Start on I 90 Business
0.1 mi·25 sec·Montana Avenue
2
Turn left onto North 23rd Street
372 ft·21 sec·North 23rd Street
3
Turn left onto I 90 Business
0.9 mi·3 min·1st Avenue North
4
Turn left onto I 90 Business
447 ft·9 sec·Division Street
5
Continue on I 90 Business
1.3 mi·1 min·Montana Avenue
6
Continue on I 90 Business
1.4 mi·2 min·Laurel Road
7
Keep slight right at fork onto I 90 Business
0.4 mi·47 sec·I 90 Business
Toward Butte, I 90 West
8
Merge onto I 90; US 212
105 mi·1 hr 43 min·I 90; US 212
9
Continue on I 90; US 89; US 191
7.0 mi·6 min·I 90; US 89; US 191
10
Continue on I 90; US 191
113 mi·1 hr 54 min·I 90; US 191
Use the straight / slight right lanes.
11
Keep slight left at fork onto I 90
31 mi·28 min·I 90
Toward I 90 West: Missoula
12
Take the exit onto I 90 Business
1.9 mi·3 min·I 90 Business
Toward I 90 Business: Deer Lodge
13
Turn right onto Saint Mary's Avenue
0.3 mi·59 sec·Saint Mary's Avenue
14
Arrive at destination
Saint Mary's Avenue
Trip Plan
To make the most of your 4-hour and 25-minute travel time, plan to depart early in the day to avoid mid-afternoon fatigue. Since the route is concentrated on a long interstate stretch, use your single planned stop strategically to break up the monotony of the 256.4-mile primary segment. Keep a close eye on your fuel gauge, even with the $42 estimate, to ensure you don't run low between major interchanges. Because this is a relatively short trip, you have the flexibility to adjust your departure time based on traffic patterns near Billings. Prioritize comfort in your vehicle, as the highway-focused nature of this drive means you will spend most of your time at steady, high-speed cruising levels.
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 131.4 miles from Billings, MT, or about 2h 13m into the drive.
The longest continuous stretch on this route runs about 256.4 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 58 miles or 1h 1m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 131.4 miles or 2h 13m 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 38m
Traffic, exits, and arrival timing usually matter more near Deer Lodge, MT than in the middle of the route.
Before You Leave
+
Open the route before leaving Billings, 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 Billings, MT
This is one driving day of about 262.9 miles and 4h 25m.
Your first comfortable stop window is around 58 miles from Billings, 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 256.4 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 8
5 decision points cluster between mile 0.1 and 260.7 — 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|North 23rd Street
Turn left onto North 23rd Street
Navigation decision point
4
0.2 mi into trip|~0m in|I 90 Business / 1st Avenue North
Turn left onto I 90 Business / 1st Avenue North
Navigation decision point
6
4 mi into trip|~8m in|I 90 Business
Keep slight right at fork onto I 90 Business toward Butte, I 90 West
Highway fork - watch signs carefully. Multiple destination signs - pick the right one
Toward Butte, I 90 West
5
230.2 mi into trip|~3h 53m in|I 90
Keep slight left at fork onto I 90 toward I 90 West: Missoula
Highway fork - watch signs carefully
Toward I 90 West: Missoula
4
260.7 mi into trip|~4h 21m in|I 90 Business
Take the exit onto I 90 Business toward I 90 Business: Deer Lodge
Exit ramp - move to the correct lane early
Toward I 90 Business: Deer Lodge
Fuel & Cost
Regular Gas
$46.21 one way
$92.43 round trip
$4.47/gal25.4 MPG avg92 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.67
$48.33
$96.65
premium
$4.99
$51.65
$103.30
diesel
$5.35
$55.37
$110.75
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$46
Meals
$25–$50
Total
$71–$96
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 92 kg one way.
Prices: EIA weekly data, 2026-06-01.
Driving Electric?
About $28 in charging
· 0 stops
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
78.9
0
$27.60
$12.62
Efficient EV
65.7
0
$23.00
$10.52
EV Truck/SUV
105.2
1
$36.81
$16.83
Gas CO2
92 kg
EV CO2
31 kg (66% 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 May 31, 2026
Origin
Billings, MT
Afternoon
in Billings on Wednesday
Local time
2:49 PM
MDT
Current temp
63°F
Rain Showers
WNW 20 mph98% chanceLive forecast
Winter Weather Advisory
Winter Weather Advisory issued May 31 at 9:03AM MDT until June 1 at 12:00AM MDT by NWS Billings MT
Flood Watch
Flood Watch issued May 31 at 2:14AM MDT until June 1 at 6:00PM MDT by NWS Great Falls MT
Destination
Deer Lodge, MT
Afternoon
in Deer Lodge on Wednesday
Local time
2:49 PM
MDT
Current temp
50°F
Light Rain
NNW 6 mph95% chanceLive forecast
Winter Weather Advisory
Winter Weather Advisory issued May 31 at 9:03AM MDT until June 1 at 12:00AM MDT by NWS Billings MT
Flood Watch
Flood Watch issued May 31 at 2:14AM MDT until June 1 at 6:00PM 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
13 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
4h 25m 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?
Expect a highly efficient experience, as 98% of this drive is spent on major highways. You will spend the vast majority of your time on I-90, which accounts for a 256.4-mile stretch of the journey. The transition between Montana Avenue, I-90 Business, and the interstate is seamless, keeping the drive fast and focused. While the route is an interstate-heavy grind, its predictability allows you to maintain a steady pace. You should prepare for a consistent highway feel that dominates the experience from start to finish.
98% highway — fuel and pacing are the main things to plan.
14 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 256.4 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 90 Business. There are only a few real navigation decisions along the way. The trickiest moment comes around 0.1 miles in near North 23rd Street.
Driving Effort4/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
This is a straightforward 4h 25m drive. You will face about 8 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 (North 23rd Street): Navigation decision point; at 0.2 miles (I 90 Business / 1st Avenue North): Navigation decision point; at 4 miles (I 90 Business): Highway fork - watch signs carefully. Multiple destination signs - pick the right one.
Billings is the largest city in Montana in Yellowstone County, with an estimated 110,000 people (2019). As a destination, Billings does a significant amount of convention business and is also the host to various regional events such as music festivals, athletic contests, rodeos, and outdoor activities. Billings hosts the largest hospitals in a 500-mile radius, as such the medical profession is a major source of employment in the area. Billings is also a frequent overnight or meal stop for westbound visitors to Yellowstone National Park, as it is the last major city for visitors going to the park via the Beartooth Highway.
Top landmarks
•Masonic Temple — building in Billings, Montana
•United States Post Office and Courthouse–Billings — post office in Billings, United States of America
•Northern Hotel — historic hotel in Billings, Montana, United States
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.
The longest stretch is about 256.4 miles on I 90. The full list of main roads is in the Roads section above.
Yes — we found about 13 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 0.1 miles (North 23rd Street): Navigation decision point; at 0.2 miles (I 90 Business / 1st Avenue North): Navigation decision point; at 4 miles (I 90 Business): Highway fork - watch signs carefully. Multiple destination signs - pick the right one.
Possible but tiring. At 4.4 hours each way, an in-and-out day trip would put you behind the wheel for 8.9 hours — manageable with a long break at Deer Lodge, MT, but most travelers stay overnight.
