How far is Helena, MT from Hardin, MT?
The driving distance from Helena, MT to Hardin, MT is about 286 miles (460.3 km), with a travel time of about 04h 59m by car.
- The straight-line flight distance is about 219.8 miles (353.8 km).
- For a round trip, plan for roughly 09h 58m 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 04h 59m.
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 and county seat of Sweet Grass County, Montana, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Chance Light Rain then Showers And Thunderstorms
Partly Sunny then Chance Rain Showers
Driving Route Map
The map below follows the saved road route between Helena and Hardin.
Turn-by-Turn Driving Directions
Step-by-step road directions between Helena and Hardin.
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1
Start on Cruse Avenue
50 m · 8 sec · Cruse Avenue
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2
Turn left onto 11th Avenue
1.4 mi · 4 min · 11th Avenue
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3
Turn straight onto Prospect Avenue
1.3 mi · 2 min · Prospect Avenue
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4
Continue straight
3.6 mi · 5 min
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5
Continue straight
1678 ft · 26 sec
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6
Continue straight
30.2 mi · 34 min
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7
Continue straight
4.9 mi · 5 min
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8
Continue straight
1787 ft · 22 sec
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9
Continue straight
22.4 mi · 24 min
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10
Take the exit left toward I 90 East: Billings
1372 ft · 34 sec
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11
Merge slight left
180.8 mi · 3 hr 2 min
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12
Keep slight right to continue on I 90 East: Sheridan
39.2 mi · 37 min
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13
Take the exit slight right toward I 90 Business, MT 47: Hardin City Center
1726 ft · 43 sec
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14
Turn right
773 ft · 18 sec
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15
Continue on North Crawford Avenue
1242 ft · 30 sec · North Crawford Avenue
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16
Turn left onto North Crawford Avenue
2759 ft · 2 min · North Crawford Avenue
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17
Arrive at your destination
0 m · 1 sec · North Crawford Avenue
Car Route Details
A richer read on the saved driving route between Helena and Hardin.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
I 90 East
Merge slight left
181 mi · 03h 02m
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.
Chance Light Rain then Showers And Thunderstorms leaving Helena and Partly Sunny then Chance Rain Showers near Hardin.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Helena to Hardin?
The road trip is about 286 miles (460.3 km) and usually takes 04h 59m 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?
Big Timber is a useful midpoint, sitting about 142.7 miles from Helena and 143.3 miles from Hardin.
How much longer is the road route than the straight-line distance?
The direct path is about 219.8 miles (353.8 km), while the road route adds roughly 66.2 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 7:02 AM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $39.28 one way or $78.56 round trip. Estimated CO2 is about 89.7 kg one way.
What should you check before leaving?
Before you leave, expect Chance Light Rain then Showers And Thunderstorms around Helena and Partly Sunny then Chance Rain Showers near Hardin.
Stop Ideas Near Big Timber
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 Big Timber.
Livingston, MT
Bozeman, MT
Billings, MT
Flight Path Map
This map shows the direct air route between Helena and Hardin. Straight-line distance: 219.87 mi (353.84 km).
#1 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 |
#2 Hardin
City in Big Horn County, Montana, United States of America
| Population | 3,705 |
| Coordinates | 45.7324800, -107.6120300 |
| Altitude | 886 |
| Country | United States |
End: Hardin (-107.61203, 45.73248)
Estimated Travel Time
Distance: 460 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 09h 31m |
| 40 mph (64.37 km/h) | 07h 09m |
| 50 mph (80.47 km/h) | 05h 43m |
| 60 mph (96.56 km/h) | 04h 46m |
| 70 mph (112.65 km/h) | 04h 05m |
| 80 mph (129 km/h) | 03h 34m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $39.28 | $78.56 |
| Mid-grade | $4.23 | $42.69 | $85.38 |
| Premium | $4.55 | $45.90 | $91.80 |
| Diesel | $5.41 | $54.61 | $109.21 |
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 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.