How far is Great Falls, MT from Deer Lodge, MT?
The driving distance from Great Falls, MT to Deer Lodge, MT is about 143.6 miles (231.1 km), with a travel time of about 02h 35m by car.
- The straight-line flight distance is about 101.8 miles (163.9 km).
- For a round trip, plan for roughly 05h 11m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM MDT.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 02h 35m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
You are leaving earlier than the recommended window, which gives you extra margin for breaks and traffic.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
State capital of Montana, United States and seat of Lewis and Clark County
Route Weather Snapshot
Check the forecast at both ends before you head out.
Light Rain
Areas Of Fog
Driving Route Map
The map below follows the saved road route between Great Falls and Deer Lodge.
Turn-by-Turn Driving Directions
Step-by-step road directions between Great Falls and Deer Lodge.
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1
Start on 4th Street South
49 m · 12 sec · 4th Street South
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2
Turn left onto 5th Avenue South
130 m · 21 sec · 5th Avenue South
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3
Turn right onto 5th Street South
1988 ft · 38 sec · 5th Street South
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4
Turn right onto 10th Avenue South
1.2 km · 1 min · 10th Avenue South
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5
Continue on Country Club Boulevard
1.3 mi · 2 min · Country Club Boulevard
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6
Keep slight left
1.2 km · 2 min
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7
Merge slight left onto First Special Service Force Memorial Highway
83.7 mi · 1 hr 20 min · First Special Service Force Memorial Highway
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8
Take the exit slight right toward Custer Avenue
2062 ft · 54 sec
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9
Turn right onto East Custer Avenue
1818 ft · 43 sec · East Custer Avenue
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10
Continue on West Custer Avenue
1.6 mi · 3 min · West Custer Avenue
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11
Turn left onto Henderson Street
1341 ft · 36 sec · Henderson Street
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12
Turn right onto Brady Street
1714 ft · 58 sec · Brady Street
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13
Continue on Joslyn Street
2756 ft · 2 min · Joslyn Street
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14
Turn right onto Euclid Avenue
41.5 mi · 46 min · Euclid Avenue
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15
Turn left
2539 ft · 43 sec
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16
Continue straight
802 ft · 14 sec
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17
Take the ramp straight
1.4 km · 2 min
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18
Merge slight left
8.2 mi · 8 min
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19
Take the exit slight right toward I 90 Business: Deer Lodge
1257 ft · 32 sec
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20
Turn right
1.5 mi · 3 min
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21
Turn left onto Saint Mary's Avenue
1356 ft · 60 sec · Saint Mary's Avenue
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22
Arrive at your destination
0 m · 1 sec · Saint Mary's Avenue
Car Route Details
A richer read on the saved driving route between Great Falls and Deer Lodge.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
First Special Service Force Memorial Highway
Merge slight left onto First Special Service Force Memorial Highway
83.7 mi · 01h 20m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Light Rain leaving Great Falls and Areas Of Fog near Deer Lodge.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Great Falls to Deer Lodge?
The road trip is about 143.6 miles (231.1 km) and usually takes 02h 35m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
Helena is a useful midpoint, sitting about 71.7 miles from Great Falls and 71.9 miles from Deer Lodge.
How much longer is the road route than the straight-line distance?
The direct path is about 101.8 miles (163.9 km), while the road route adds roughly 41.8 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 8:00 AM to 10:00 AM MDT. If you want a more comfortable same-day return, try to leave by 1:18 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $19.74 one way or $39.48 round trip. Estimated CO2 is about 45.1 kg one way.
What should you check before leaving?
Before you leave, expect Light Rain around Great Falls and Areas Of Fog near Deer Lodge.
Stop Ideas Near Helena
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Helena.
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Flight Path Map
This map shows the direct air route between Great Falls and Deer Lodge. Straight-line distance: 101.82 mi (163.86 km).
#1 Great Falls
Town in Cascade County, Montana, United States
| Population | 58,353 |
| Coordinates | 47.5002400, -111.3008100 |
| Altitude | 1015 |
| Country | United States |
#2 Deer Lodge
City in and the county seat of Powell County, Montana, United States
| Population | 2,805 |
| Coordinates | 46.3957600, -112.7300400 |
| Altitude | 1392 |
| Country | United States |
End: Deer Lodge (-112.73004, 46.39576)
Estimated Travel Time
Distance: 231 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 04h 47m |
| 40 mph (64.37 km/h) | 03h 35m |
| 50 mph (80.47 km/h) | 02h 52m |
| 60 mph (96.56 km/h) | 02h 23m |
| 70 mph (112.65 km/h) | 02h 03m |
| 80 mph (129 km/h) | 01h 47m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $19.74 | $39.48 |
| Mid-grade | $4.23 | $21.45 | $42.90 |
| Premium | $4.55 | $23.06 | $46.13 |
| Diesel | $5.41 | $27.44 | $54.88 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in Montana · Jun 02, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.