How far is Roundup, MT from Helena, MT?
The driving distance from Roundup, MT to Helena, MT is about 202.9 miles (326.6 km), with a travel time of about 03h 42m by car.
- The straight-line flight distance is about 166.4 miles (267.8 km).
- For a round trip, plan for roughly 07h 25m 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 42m.
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.
City in Montana
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Partly Sunny then Slight Chance Light Rain
Driving Route Map
The map below follows the saved road route between Roundup and Helena.
Turn-by-Turn Driving Directions
Step-by-step road directions between Roundup and Helena.
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1
Start on Main Street
1245 ft · 25 sec · Main Street
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2
Turn right onto 1st Avenue West
1.6 mi · 2 min · 1st Avenue West
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3
Turn right
125.2 mi · 2 hr 49 min
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4
Turn left onto 3rd Avenue Southwest
42.1 mi · 47 min · 3rd Avenue Southwest
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5
Turn right onto North Front Street
33.1 mi · 40 min · North Front Street
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6
Turn left onto North Montana Avenue
146 m · 18 sec · North Montana Avenue
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7
Turn right onto 11th Avenue
1.3 km · 2 min · 11th Avenue
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8
Turn right onto Cruse Avenue
50 m · 6 sec · Cruse Avenue
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9
Arrive at your destination
0 m · 1 sec · Cruse Avenue
Car Route Details
A richer read on the saved driving route between Roundup and Helena.
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 right
125 mi · 02h 49m
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.
Mostly Sunny leaving Roundup and Partly Sunny then Slight Chance Light Rain near Helena.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Roundup to Helena?
The road trip is about 202.9 miles (326.6 km) and usually takes 03h 42m 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?
White Sulphur Springs is a useful midpoint, sitting about 101.3 miles from Roundup and 101.6 miles from Helena.
How much longer is the road route than the straight-line distance?
The direct path is about 166.4 miles (267.8 km), while the road route adds roughly 36.5 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 9:34 AM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $27.87 one way or $55.75 round trip. Estimated CO2 is about 63.6 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Roundup and Partly Sunny then Slight Chance Light Rain near Helena.
Stop Ideas Near White Sulphur Springs
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 White Sulphur Springs.
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Livingston, MT
Flight Path Map
This map shows the direct air route between Roundup and Helena. Straight-line distance: 166.43 mi (267.85 km).
#1 Roundup
City in Musselshell County, Montana, United States
| Population | 1,864 |
| Coordinates | 46.4452400, -108.5418000 |
| Altitude | 980 |
| Country | United States |
#2 Helena
State capital of Montana, United States and seat of Lewis and Clark County
| Population | 33,737 |
| Coordinates | 46.5927100, -112.0361100 |
| Altitude | 1237 |
| Country | United States |
End: Cruse Avenue (-112.036062, 46.592722)
Estimated Travel Time
Distance: 327 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 06h 45m |
| 40 mph (64.37 km/h) | 05h 04m |
| 50 mph (80.47 km/h) | 04h 03m |
| 60 mph (96.56 km/h) | 03h 22m |
| 70 mph (112.65 km/h) | 02h 53m |
| 80 mph (129 km/h) | 02h 31m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $27.87 | $55.75 |
| Mid-grade | $4.23 | $30.29 | $60.59 |
| Premium | $4.55 | $32.57 | $65.14 |
| Diesel | $5.41 | $38.75 | $77.50 |
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 · May 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.