How far is Eureka, MT from Helena, MT?
The driving distance from Eureka, MT to Helena, MT is about 257.8 miles (414.9 km), with a travel time of about 04h 30m by car.
- The straight-line flight distance is about 211.2 miles (339.9 km).
- For a round trip, plan for roughly 09h 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 04h 30m.
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 Eureka and Helena.
Turn-by-Turn Driving Directions
Step-by-step road directions between Eureka and Helena.
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1
Start on 2nd Street
30 m · 6 sec · 2nd Street
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2
Turn right onto Dewey Avenue
600 ft · 21 sec · Dewey Avenue
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3
Continue on Riverside Drive
50.1 mi · 56 min · Riverside Drive
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4
Turn right onto Parkhill Drive
110 m · 21 sec · Parkhill Drive
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5
Turn left onto West 3rd Street
972 ft · 48 sec · West 3rd Street
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6
Turn left onto Karrow Avenue
111 m · 14 sec · Karrow Avenue
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7
Turn right onto West 2nd Street
1.2 km · 2 min · West 2nd Street
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8
Turn right onto Spokane Avenue
1.7 mi · 4 min · Spokane Avenue
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9
Continue on US 93 South
3.2 mi · 4 min · US 93 South
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10
Continue on US 93 North
6.8 mi · 8 min · US 93 North
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11
Turn left onto West Reserve Drive
3.5 mi · 6 min · West Reserve Drive
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12
Turn right onto Helena Flats Road
1.1 mi · 2 min · Helena Flats Road
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13
Turn left
1.1 mi · 2 min
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14
Continue straight
14.7 mi · 17 min
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15
Turn left
91.1 mi · 1 hr 44 min
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16
Turn left
23.8 mi · 26 min
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17
Turn right onto State Highway 141
32.5 mi · 35 min · State Highway 141
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18
Turn left
29.8 mi · 35 min
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19
Turn right onto North Benton Avenue
1542 ft · 58 sec · North Benton Avenue
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20
Turn left onto Neill Avenue
1201 ft · 43 sec · Neill Avenue
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21
Turn slight right onto Cruse Avenue
31 m · 4 sec · Cruse Avenue
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22
Arrive at your destination
0 m · 1 sec · Cruse Avenue
Car Route Details
A richer read on the saved driving route between Eureka 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 left
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 Eureka and Chance Light Rain then Showers And Thunderstorms near Helena.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Eureka to Helena?
The road trip is about 257.8 miles (414.9 km) and usually takes 04h 30m 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 130.6 miles from Eureka and 127.3 miles from Helena.
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 46.6 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 8:00 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 Eureka and Chance Light Rain then Showers And Thunderstorms near Helena.
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 Eureka and Helena. Straight-line distance: 211.24 mi (339.95 km).
#1 Eureka
Town in Lincoln County, Montana, United States
| Population | 1,445 |
| Coordinates | 48.8799600, -115.0535000 |
| Altitude | 787 |
| 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: 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 40m |
| 80 mph (129 km/h) | 03h 12m |
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 22, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.