How far is Roundup, MT from Great Falls, MT?
The driving distance from Roundup, MT to Great Falls, MT is about 181.4 miles (292 km), with a travel time of about 03h 08m by car.
- The straight-line flight distance is about 149.1 miles (239.9 km).
- For a round trip, plan for roughly 06h 17m 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 08m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
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.
Town of the United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Driving Route Map
The map below follows the saved road route between Roundup and Great Falls.
Turn-by-Turn Driving Directions
Step-by-step road directions between Roundup and Great Falls.
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1
Start on Main Street
2663 ft · 45 sec · Main Street
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2
Turn slight left
44.4 mi · 1 hr 3 min
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3
Turn left
30.6 mi · 35 min
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4
Turn right onto 1st Avenue North
1629 ft · 30 sec · 1st Avenue North
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5
Continue on Truck Bypass
2.6 mi · 4 min · Truck Bypass
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6
Continue on US Highway 87
14.7 mi · 16 min · US Highway 87
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7
Continue straight
64.3 mi · 1 hr 10 min
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8
Turn slight right
1588 ft · 21 sec
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9
Enter the roundabout and take exit 2 toward the route
52 m · 2 sec
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10
Exit the roundabout
557 ft · 7 sec
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11
Continue straight
23.1 mi · 29 min
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12
Turn right onto 6th Street South
1989 ft · 39 sec · 6th Street South
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13
Turn left onto 5th Avenue South
864 ft · 40 sec · 5th Avenue South
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14
Turn right onto 4th Street South
49 m · 7 sec · 4th Street South
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15
Arrive at your destination
0 m · 1 sec · 4th Street South
Car Route Details
A richer read on the saved driving route between Roundup and Great Falls.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
US Highway 87
Continue 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 Roundup and Sunny near Great Falls.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Roundup to Great Falls?
The road trip is about 181.4 miles (292 km) and usually takes 03h 08m 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 Roundup and 90.8 miles from Great Falls.
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 32.3 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 10:42 AM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $24.92 one way or $49.83 round trip. Estimated CO2 is about 56.9 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Roundup and Sunny near Great Falls.
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 Roundup and Great Falls. Straight-line distance: 149.09 mi (239.94 km).
#1 Roundup
City in Musselshell County, Montana, United States
| Population | 1,864 |
| Coordinates | 46.4452400, -108.5418000 |
| Altitude | 980 |
| Country | United States |
#2 Great Falls
Town in Cascade County, Montana, United States
| Population | 58,353 |
| Coordinates | 47.5002400, -111.3008100 |
| Altitude | 1015 |
| Country | United States |
End: 4th Street South (-111.300848, 47.50024)
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 | $24.92 | $49.83 |
| Mid-grade | $4.23 | $27.08 | $54.16 |
| Premium | $4.55 | $29.11 | $58.23 |
| Diesel | $5.41 | $34.64 | $69.27 |
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.