How far is Boulder, MT from Missoula, MT?
Fastest route
The route from Boulder, Montana 59632 to Missoula, Montana is approximately 144 miles and takes about 2 hours and 18 minutes via US-12 W and I-90 W.
Directions
- Get on I-15 N: Head east on W Centennial Ave toward N Main St. Turn left at the 1st cross street onto N Main St. Turn right to merge onto I-15 N toward Helena.
- Follow I-15 N to Cedar St in Helena. Take exit 193 from I-15 N: Use the right 2 lanes to take exit 193 for Cedar St.
- Follow US-12 W to I-90 W in Garrison: Continue onto N Last Chance Gulch/N Main St. Turn right onto W Lyndale Ave. Continue onto US-12 W/Euclid Ave.
- Merge onto I-90 W/US-12 W. Take exit 105 for I-90 BUS W/US-12 W/Van Buren St.
- Follow N Van Buren St to E Broadway St: At the traffic circle, take the 3rd exit onto US-12/N Van Buren St. At the next traffic circle, take the 1st exit onto N Van Buren St.
- Turn right onto E Broadway St: Pass by Burger King (on the left). Continue straight to stay on E Broadway St.
Tips & Suggestions
- 🚗 Make sure to check the traffic conditions before starting your journey.
- ⛽ Plan for fuel stops along the way, especially if your vehicle has a limited range.
- 📱 Use a navigation app or GPS device to help you stay on track and find the best routes.
- 🛣️ Be aware of any road closures or construction that may affect your route and adjust accordingly.
- 🚦 Observe traffic signs and signals, and follow the speed limits for a safe and smooth journey.
- 🍽️ Consider stopping for meals or snacks at suitable locations along the way.
- 🚗 Take breaks if needed to rest, stretch, and stay alert during the drive.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
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 02h 18m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
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 the county seat of Powell County, Montana, United States
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 Boulder and Missoula.
Turn-by-Turn Driving Directions
Step-by-step road directions between Boulder and Missoula.
-
1
Start on West Centennial Avenue
112 m · 16 sec · West Centennial Avenue
-
2
Turn left onto North Main Street
1.1 km · 1 min · North Main Street
-
3
Take the ramp right toward Helena
1284 ft · 31 sec
-
4
Merge slight left
27.8 mi · 26 min
-
5
Take the exit slight right toward Cedar Street
1483 ft · 44 sec
-
6
Turn left onto Cedar Street
1.3 km · 2 min · Cedar Street
-
7
Continue on North Last Chance Gulch Street
1.3 km · 2 min · North Last Chance Gulch Street
-
8
Turn right onto West Lyndale Avenue
2353 ft · 1 min · West Lyndale Avenue
-
9
Continue on Euclid Avenue
111.6 mi · 1 hr 55 min · Euclid Avenue
-
10
Take the exit slight right toward US 12 West, I 90 Business
1037 ft · 26 sec
-
11
Enter the roundabout and take exit 3 toward Van Buren Street
63 m · 3 sec · Van Buren Street
-
12
Exit the roundabout onto Van Buren Street
65 m · 4 sec · Van Buren Street
-
13
Enter the roundabout and take exit 1 toward Van Buren Street
28 m · 1 sec · Van Buren Street
-
14
Exit the roundabout onto Van Buren Street
583 ft · 11 sec · Van Buren Street
-
15
Turn right onto East Broadway Street
3078 ft · 55 sec · East Broadway Street
-
16
Turn right onto North Higgins Avenue
6 m · 1 sec · North Higgins Avenue
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17
Arrive at your destination
0 m · 1 sec · North Higgins Avenue
Car Route Details
A richer read on the saved driving route between Boulder and Missoula.
Interchange-aware route
The drive includes several ramps, exits, or merges, so checking the next few maneuvers before busy interchanges is useful.
Euclid Avenue
Continue on Euclid Avenue
112 mi · 01h 55m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Chance Light Rain then Showers And Thunderstorms leaving Boulder and Chance Light Rain then Showers And Thunderstorms near Missoula.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Boulder to Missoula?
The road trip is about 143.1 miles (230.3 km) and usually takes 02h 18m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
Deer Lodge is a useful midpoint, sitting about 71.8 miles from Boulder and 71.3 miles from Missoula.
How much longer is the road route than the straight-line distance?
The direct path is about 99.2 miles (159.7 km), while the road route adds roughly 43.9 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 8:00 AM to 10:00 AM MDT. If you want a more comfortable same-day return, try to leave by 1:54 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $19.66 one way or $39.32 round trip. Estimated CO2 is about 44.9 kg one way.
What should you check before leaving?
Before you leave, expect Chance Light Rain then Showers And Thunderstorms around Boulder and Chance Light Rain then Showers And Thunderstorms near Missoula.
Stop Ideas Near Deer Lodge
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 Deer Lodge.
Butte, MT
Missoula, MT
Flight Path Map
This map shows the direct air route between Boulder and Missoula. Straight-line distance: 99.24 mi (159.71 km).
#1 Boulder
Town in Montana
| Population | 1,291 |
| Coordinates | 46.2365900, -112.1208300 |
| Altitude | 1496 |
| Country | United States |
#2 Missoula
The most populous city in Missoula County, Montana.
| Population | 76,848 |
| Coordinates | 46.8721500, -113.9940000 |
| Altitude | 978 |
| Country | United States |
End: North Higgins Avenue (-113.994022, 46.872156)
Estimated Travel Time
Distance: 230 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 04h 46m |
| 40 mph (64.37 km/h) | 03h 34m |
| 50 mph (80.47 km/h) | 02h 51m |
| 60 mph (96.56 km/h) | 02h 23m |
| 70 mph (112.65 km/h) | 02h 02m |
| 80 mph (129 km/h) | 01h 47m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $19.66 | $39.32 |
| Mid-grade | $4.23 | $21.37 | $42.73 |
| Premium | $4.55 | $22.97 | $45.94 |
| Diesel | $5.41 | $27.33 | $54.66 |
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.