Origin
Butte, MT
Evening in Butte on Saturday
Local time
7:26 PM
MDT
Current temp
66°F
Unavailable
Live forecast
Trip from Butte, MT to Helena, MT
Compiled and reviewed by the US Trip Planner planning team at COD Solutions Oy · Last reviewed Apr 19, 2026 · Editorial standards
Drive Time
1h 13m
Distance
68.4 mi
110 km
Drive Score
7/10
Good drive
Same Day?
Yes, doable
Fuel Cost
$11
one way
EV Charging
Good
5 stations
Best Time to Leave
4 AM
1h 7m
★
6 AM
1h 13m
8 AM
1h 25m
10 AM
1h 17m
12 PM
1h 16m
3 PM
1h 18m
5 PM
1h 24m
8 PM
1h 10m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Butte, MT
Wikimedia Commons
Helena, MT
Wikimedia Commons
Trip Overview
Connecting the historic mining hubs of Butte and Helena, this 68.4-mile trek is a straightforward journey through the heart of Montana. You can easily complete the drive in about 1 hour and 13 minutes, making it an ideal day trip that doesn't require an overnight stay. With fuel costs estimated at $11, it is a budget-friendly way to move between these two Mountain West cities. Since the route is almost entirely highway-focused, you will spend the vast majority of your time cruising on I-15. Whether you are commuting for work or heading north for a weekend visit, the efficiency of this connection allows for maximum flexibility in your travel schedule.
Main Roads
| Road | Distance | Duration |
|---|---|---|
| I 15 | 64.7 mi | 1h 4m |
| Prospect Avenue | 1.2 mi | 2m |
| 11th Avenue | 0.8 mi | 2m |
| South Montana Street | 0.4 mi | <1m |
| South Main Street | 0.4 mi | <1m |
| I 15 Business | 0.3 mi | <1m |
| West Front Street | 0.3 mi | <1m |
| North Montana Avenue | <0.1 mi | <1m |
Longest stretch:
I 15
— 64.7 mi, about 1h 4m
Turn-by-Turn Driving Directions
Step-by-step road directions between Butte, MT and Helena, MT.
1
Start on West Iron Street
70 ft
·
5 sec
·
West Iron Street
2
Turn right onto South Main Street
0.4 mi
·
45 sec
·
South Main Street
3
Turn right onto West Front Street
0.3 mi
·
29 sec
·
West Front Street
4
Turn left onto South Montana Street
0.4 mi
·
45 sec
·
South Montana Street
5
Turn left onto La Salle Street
292 ft
·
4 sec
·
La Salle Street
6
Take the ramp
0.2 mi
·
23 sec
7
Merge onto I 15; I 90
2.5 mi
·
2 min
·
I 15; I 90
8
Take the exit onto I 15
62 mi
·
1 hr 1 min
·
I 15
Exit 129
Toward I 15 North: Helena
Use the straight / slight right lanes.
9
Take the exit onto I 15 Business
0.3 mi
·
41 sec
·
I 15 Business
Exit 192
Toward I 15 Business, US 12, US 287: Townsend, Capitol Area
10
Continue on I 15 Business; US 12
1.2 mi
·
2 min
·
Prospect Avenue
Use the left lane.
11
Turn left onto I 15 Business; US 12
478 ft
·
17 sec
·
North Montana Avenue
12
Turn right onto I 15 Business
0.8 mi
·
2 min
·
11th Avenue
Use the straight / right lanes.
13
Turn right onto I 15 Business
163 ft
·
5 sec
·
Cruse Avenue
14
Arrive at destination
I 15 Business
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Mid-route town
Meal stop
34 mi into the route
Best for: Lunch, fuel, and a longer reset
This sits close to the middle of the route, so it works well for the longest stop of the day.
Pacing Suggestions
Fuel and coffee
A short stop after about 15 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 34.2 miles from Butte, MT, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel checkTop up before I 15 if your tank is already low. That segment runs about 64.7 miles.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Heads-up: tricky spots
5 of 125 decision points cluster between mile 0 and 67.6 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
4
0 mi into trip
|
~0m in
|
South Main Street
Turn right onto South Main Street
Navigation decision point
4
0.4 mi into trip
|
~0m in
|
West Front Street
Turn right onto West Front Street
Navigation decision point
7
3.8 mi into trip
|
~5m in
|
I 15
Take the exit onto I 15 toward I 15 North: Helena
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the straight / slight right lanes.
Exit 129
Toward I 15 North: Helena
6
66 mi into trip
|
~1h 6m in
|
I 15 Business
Take the exit onto I 15 Business toward I 15 Business, US 12, US 287: Townsend, Capitol Area
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Exit 192
Toward I 15 Business, US 12, US 287: Townsend,...
6
67.6 mi into trip
|
~1h 10m in
|
I 15 Business / 11th Avenue
Turn right onto I 15 Business / 11th Avenue
Lane positioning matters here
Use the straight / right lanes.
Fuel & Cost
Regular Gas
$10.84 one way
$21.68 round trip
$4.03/gal
25.4 MPG avg
24 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.22 | $11.36 | $22.72 |
| premium | $4.53 | $12.20 | $24.40 |
| diesel | $5.61 | $15.10 | $30.20 |
No toll roads detected on this route.
Drive Cost (one way)
Fuel
$11
Estimated CO2 emission: 23.9 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $7 in charging · 0 stops · 67% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 20.5 | 0 | $7.18 | $3.28 |
| Efficient EV | 17.1 | 0 | $5.99 | $2.74 |
| EV Truck/SUV | 27.4 | 0 | $9.58 | $4.38 |
Gas CO2
24 kg
EV CO2
8 kg (67% less)
This trip is well within single-charge range for most EVs. No charging stops needed if you start fully charged.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Travel Intel
Current conditions at both ends of the drive.
Destination
Helena, MT
Evening in Helena on Saturday
Local time
7:26 PM
MDT
Current temp
62°F
Unavailable
Live forecast
59°F
Boulder, MT
34 mi in
Time zone
Same local time
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
4 degrees cooler at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
1h 13m on the road
Use the two city cards together: check the sky where you start, then compare it with the local time and temperature at arrival.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
What kind of drive is this?
Expect a consistent, highway-focused experience as 95% of your travel takes place on high-speed roads. The vast majority of your time behind the wheel—64.7 miles to be exact—is spent on the I-15 corridor, providing a steady and predictable pace. As you approach your destination, the route transitions off the interstate and onto local thoroughfares like Prospect Avenue and 11th Avenue to navigate into Helena. This is not a technical or winding mountain pass, but rather a functional, efficient link between two regional centers. You will find that the road maintains a professional, utilitarian personality that prioritizes speed and directness over scenic detours.
95% highway — fuel and pacing are the main things to plan.
14 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 64.7 mi on I 15.
How Hard Is This Drive?
4/10
This is a straightforward highway drive that stays mostly on I 15 and Prospect Avenue. There are only a few real navigation decisions along the way. The trickiest moment comes early in the drive near South Main Street.
Driving Effort
4/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
This is a straightforward 1h 13m drive. You will face about 12 decision points, but nothing that requires special attention if you follow navigation.
Where does it get tricky?
The main spots that need attention: near the start (South Main Street): Navigation decision point; at 0.4 miles (West Front Street): Navigation decision point; at 3.8 miles (I 15): Exit ramp - move to the correct lane early. Lane positioning matters here.
Elevation Profile
High-altitude sections with notable climbs
6,355 ft
4,800 ft
Total Climb
1,212 ft
Total Descent
1,948 ft
Highest Point
6,355 ft
~8.5 mi in
Elevation Range
1,555 ft
Notable High Points
6,355 ft at ~8.5 miles
+26 ft prominence
5,514 ft at ~45.6 miles
+394 ft prominence
About the Cities
Arriving in Helena, MT
Full guide →Helena is the state capital of Montana, in the Western Central part of the state. Visitors come to see Helena’s historic Last Chance Gulch, and its mansion district once home to Helena’s gold mining millionaires. The city has running or biking 75 mi (121 km) of trails and opportunities for rafting the mighty Missouri River or fly-fishing.
City content from Wikivoyage (CC BY-SA 4.0) and Wikidata (CC0).
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 1h 13m. Total distance: 68.4 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
1h 13m drive, comfortable solo distance.
EV Driver
0 DC fast chargers along the route. Coverage: unknown.
First-Time Driver
Mostly highway driving (95%). Straightforward navigation.
Frequently Asked Questions
The longest stretch is about 64.7 miles on I 15. The full list of main roads is in the Roads section above.
Yes. At under 2 hours behind the wheel, this works well for families — plan one quick stop if you have younger kids.
Mostly yes along the main roads, but rural stretches through MT can have sparse or no coverage. Before you leave, download offline Google Maps or Apple Maps for the route, and consider downloading music or podcasts instead of streaming. If you depend on data for navigation, keep a paper backup of the turn-by-turn directions.
The main spots that need attention: near the start (South Main Street): Navigation decision point; at 0.4 miles (West Front Street): Navigation decision point; at 3.8 miles (I 15): Exit ramp - move to the correct lane early. Lane positioning matters here.
Yes. A round trip is manageable in a single day if you plan a break at Helena, MT before heading back.
How this page is built
Compiled by the US Trip Planner planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, EIA for fuel prices, and USGS 3DEP for elevation. See our methodology for refresh cadence and limitations.
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