How far is Helena, MT from Eureka, MT?
The driving distance from Helena, MT to Eureka, MT is about 257.9 miles (415.1 km), with a travel time of about 05h 00m by car.
- The straight-line flight distance is about 211.2 miles (339.9 km).
- For a round trip, plan for roughly 10h 00m 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 05h 00m.
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.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Chance Light Rain then Showers And Thunderstorms
Chance Light Rain then Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Helena and Eureka.
Turn-by-Turn Driving Directions
Step-by-step road directions between Helena and Eureka.
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1
Start on Cruse Avenue
31 m · 6 sec · Cruse Avenue
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2
Turn slight left onto Neill Avenue
1041 ft · 36 sec · Neill Avenue
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3
Turn straight
68 m · 10 sec
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4
Continue on North Benton Avenue
1422 ft · 50 sec · North Benton Avenue
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5
Turn left onto Euclid Avenue
29.9 mi · 35 min · Euclid Avenue
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6
Turn right
32.5 mi · 35 min
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7
At the end of the road, turn left
23.8 mi · 26 min
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8
Turn right
91.1 mi · 1 hr 44 min
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9
At the end of the road, turn right
1821 ft · 39 sec
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10
Turn left
6.9 mi · 9 min
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11
Turn right onto US 93 South
4.8 mi · 6 min · US 93 South
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12
Turn left onto Kalispell Bypass
1305 ft · 25 sec · Kalispell Bypass
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13
Enter the roundabout and take exit 1 toward Kalispell Bypass
46 m · 2 sec · Kalispell Bypass
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14
Exit the roundabout onto Kalispell Bypass
1.6 km · 1 min · Kalispell Bypass
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15
Enter the roundabout and take exit 2 toward Kalispell Bypass
52 m · 2 sec · Kalispell Bypass
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16
Exit the roundabout onto Kalispell Bypass
3.5 mi · 4 min · Kalispell Bypass
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17
Take the exit slight right toward MT 424
1738 ft · 55 sec
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18
Turn left onto Three Mile Drive
1.1 mi · 2 min · Three Mile Drive
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19
Turn straight onto Farm To Market Road
11.6 mi · 16 min · Farm To Market Road
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20
Turn right onto Lodgepole Road
2.4 mi · 3 min · Lodgepole Road
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21
Continue on Twin Bridges Road
1.3 mi · 5 min · Twin Bridges Road
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22
At the end of the road, turn left
46.5 mi · 51 min
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23
Turn left onto 2nd Street
30 m · 4 sec · 2nd Street
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24
Arrive at your destination
0 m · 1 sec · 2nd Street
Car Route Details
A richer read on the saved driving route between Helena and Eureka.
Interchange-aware route
The drive includes several ramps, exits, or merges, so checking the next few maneuvers before busy interchanges is useful.
Longest stretch
Turn right
91.1 mi · 01h 44m
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 Chance Light Rain then Showers And Thunderstorms near Eureka.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Helena to Eureka?
The road trip is about 257.9 miles (415.1 km) and usually takes 05h 00m 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?
Ronan is a useful midpoint, sitting about 128.8 miles from Helena and 129.1 miles from Eureka.
How much longer is the road route than the straight-line distance?
The direct path is about 211.2 miles (339.9 km), while the road route adds roughly 46.7 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 7:00 AM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $35.43 one way or $70.85 round trip. Estimated CO2 is about 80.9 kg one way.
What should you check before leaving?
Before you leave, expect Chance Light Rain then Showers And Thunderstorms around Helena and Chance Light Rain then Showers And Thunderstorms near Eureka.
Stop Ideas Near Ronan
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 Ronan.
Missoula, MT
Essex
Whitefish station
West Glacier
Flight Path Map
This map shows the direct air route between Helena and Eureka. Straight-line distance: 211.24 mi (339.95 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 Eureka
Town in Lincoln County, Montana, United States
| Population | 1,445 |
| Coordinates | 48.8799600, -115.0535000 |
| Altitude | 787 |
| Country | United States |
End: Eureka (-115.0535, 48.87996)
Estimated Travel Time
Distance: 415 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 08h 35m |
| 40 mph (64.37 km/h) | 06h 26m |
| 50 mph (80.47 km/h) | 05h 09m |
| 60 mph (96.56 km/h) | 04h 17m |
| 70 mph (112.65 km/h) | 03h 41m |
| 80 mph (129 km/h) | 03h 13m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $35.43 | $70.85 |
| Mid-grade | $4.23 | $38.50 | $77.00 |
| Premium | $4.55 | $41.40 | $82.79 |
| Diesel | $5.41 | $49.25 | $98.50 |
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 · 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.