How far is Missoula, MT from Boulder, MT?
The driving distance from Missoula, MT to Boulder, MT is about 143.6 miles (231.1 km), with a travel time of about 02h 30m by car.
- The straight-line flight distance is about 99.2 miles (159.7 km).
- For a round trip, plan for roughly 05h 01m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM MDT.
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 30m.
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.
Sunny
Driving Route Map
The map below follows the saved road route between Missoula and Boulder.
Turn-by-Turn Driving Directions
Step-by-step road directions between Missoula and Boulder.
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1
Start on North Higgins Avenue
6 m · 8 sec · North Higgins Avenue
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2
Turn left onto East Broadway Street
3078 ft · 59 sec · East Broadway Street
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3
Turn left onto Van Buren Street
133 m · 6 sec · Van Buren Street
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4
Take the exit right
1216 ft · 30 sec
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5
Merge slight left onto Jeannette Rankin Memorial Highway
67.9 mi · 1 hr 5 min · Jeannette Rankin Memorial Highway
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6
Take the exit slight right toward US 12 East: Garrison, Helena
43.8 mi · 51 min
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7
Continue on West Lyndale Avenue
2326 ft · 1 min · West Lyndale Avenue
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8
Turn left onto North Last Chance Gulch Street
1.1 km · 2 min · North Last Chance Gulch Street
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9
Keep slight right to continue on North Last Chance Gulch Street
677 ft · 18 sec · North Last Chance Gulch Street
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10
Continue on Cedar Street
2883 ft · 1 min · Cedar Street
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11
Take the ramp slight right toward Butte
1290 ft · 31 sec
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12
Merge slight left onto First Special Service Force Memorial Highway
27.9 mi · 26 min · First Special Service Force Memorial Highway
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13
Take the exit slight right toward MT 69: Boulder
1242 ft · 37 sec
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14
Turn left
1.3 km · 1 min
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15
Turn right onto West Centennial Avenue
112 m · 16 sec · West Centennial Avenue
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16
Arrive at your destination
0 m · 1 sec · West Centennial Avenue
Car Route Details
A richer read on the saved driving route between Missoula and Boulder.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Jeannette Rankin Memorial Highway
Merge slight left onto Jeannette Rankin Memorial Highway
67.9 mi · 01h 05m
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.
Sunny leaving Missoula and Sunny near Boulder.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Missoula to Boulder?
The road trip is about 143.6 miles (231.1 km) and usually takes 02h 30m 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 71.7 miles from Missoula and 72 miles from Boulder.
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 44.4 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 1:28 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $19.74 one way or $39.48 round trip. Estimated CO2 is about 45.1 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Missoula and Sunny near Boulder.
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 Missoula and Boulder. Straight-line distance: 99.24 mi (159.71 km).
#1 Missoula
The most populous city in Missoula County, Montana.
| Population | 76,848 |
| Coordinates | 46.8721500, -113.9940000 |
| Altitude | 978 |
| Country | United States |
#2 Boulder
Town in Montana
| Population | 1,291 |
| Coordinates | 46.2365900, -112.1208300 |
| Altitude | 1496 |
| Country | United States |
End: Boulder (-112.12083, 46.23659)
Estimated Travel Time
Distance: 231 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 04h 47m |
| 40 mph (64.37 km/h) | 03h 35m |
| 50 mph (80.47 km/h) | 02h 52m |
| 60 mph (96.56 km/h) | 02h 23m |
| 70 mph (112.65 km/h) | 02h 03m |
| 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 | $19.74 | $39.48 |
| Mid-grade | $4.23 | $21.45 | $42.90 |
| Premium | $4.55 | $23.06 | $46.13 |
| Diesel | $5.41 | $27.44 | $54.88 |
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 18, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.