How far is Great Falls, MT from Roundup, MT?
The driving distance from Great Falls, MT to Roundup, MT is about 181.6 miles (292.2 km), with a travel time of about 03h 36m by car.
- The straight-line flight distance is about 149.1 miles (239.9 km).
- For a round trip, plan for roughly 07h 13m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM MDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
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 03h 36m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
This departure sits inside the recommended comfort window for the route.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
Town of the United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Sunny
Driving Route Map
The map below follows the saved road route between Great Falls and Roundup.
Turn-by-Turn Driving Directions
Step-by-step road directions between Great Falls and Roundup.
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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 · 36 sec · 5th Street South
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4
Turn left onto 10th Avenue South
5.7 mi · 8 min · 10th Avenue South
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5
Continue straight
17.6 mi · 19 min
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6
Enter the roundabout and take exit 2 toward the route
68 m · 3 sec
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7
Exit the roundabout
1606 ft · 21 sec
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8
Turn straight
64.3 mi · 1 hr 10 min
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9
Continue straight
14.7 mi · 16 min
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10
Turn straight onto Truck Bypass
2.6 mi · 4 min · Truck Bypass
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11
Continue on 1st Avenue North
1629 ft · 37 sec · 1st Avenue North
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12
Turn left onto East Main Street
1946 ft · 1 min · East Main Street
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13
Continue on Northeast Main Street
1.1 mi · 2 min · Northeast Main Street
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14
Continue on US Highway 87
29.1 mi · 31 min · US Highway 87
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15
Turn right
44.9 mi · 1 hr 4 min
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16
Arrive at your destination
0 m · 1 sec · Main Street
Car Route Details
A richer read on the saved driving route between Great Falls and Roundup.
Straightforward drive
The saved road route has a manageable number of maneuvers and should be easy to follow with normal attention to signs.
Longest stretch
Turn straight
64.3 mi · 01h 10m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Sunny leaving Great Falls and Sunny near Roundup.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Great Falls to Roundup?
The road trip is about 181.6 miles (292.2 km) and usually takes 03h 36m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Moore is a useful midpoint, sitting about 90.6 miles from Great Falls and 90.9 miles from Roundup.
How much longer is the road route than the straight-line distance?
The direct path is about 149.1 miles (239.9 km), while the road route adds roughly 32.5 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 6:00 AM to 8:00 AM MDT. If you want a more comfortable same-day return, try to leave by 9:46 AM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $24.95 one way or $49.91 round trip. Estimated CO2 is about 57 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Great Falls and Sunny near Roundup.
Stop Ideas Near Moore
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Montana Mental Health Nursing Care Center
Lewistown City Water Clerk
Lewistown Civic Center
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Moore.
Flight Path Map
This map shows the direct air route between Great Falls and Roundup. Straight-line distance: 149.09 mi (239.94 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 Roundup
City in Musselshell County, Montana, United States
| Population | 1,864 |
| Coordinates | 46.4452400, -108.5418000 |
| Altitude | 980 |
| Country | United States |
End: Roundup (-108.5418, 46.44524)
Estimated Travel Time
Distance: 292 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 06h 02m |
| 40 mph (64.37 km/h) | 04h 32m |
| 50 mph (80.47 km/h) | 03h 37m |
| 60 mph (96.56 km/h) | 03h 01m |
| 70 mph (112.65 km/h) | 02h 35m |
| 80 mph (129 km/h) | 02h 15m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $24.95 | $49.91 |
| Mid-grade | $4.23 | $27.12 | $54.24 |
| Premium | $4.55 | $29.16 | $58.32 |
| Diesel | $5.41 | $34.69 | $69.38 |
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 · Apr 18, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.