How far is Montpelier, ID from Boise, ID?
The driving distance from Montpelier, ID to Boise, ID is about 321.9 miles (518 km), with a travel time of about 04h 46m by car.
- The straight-line flight distance is about 263.5 miles (424.1 km).
- For a round trip, plan for roughly 09h 33m 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 46m.
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.
City in Minidoka County, Idaho, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Montpelier and Boise.
Turn-by-Turn Driving Directions
Step-by-step road directions between Montpelier and Boise.
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1
Start on North 4th Street
63.6 mi · 1 hr 19 min · North 4th Street
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2
Take the exit slight right
1973 ft · 21 sec
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3
Merge slight left onto Veterans Memorial Highway
23.9 mi · 24 min · Veterans Memorial Highway
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4
Take the exit slight right
1043 ft · 14 sec
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5
Continue straight
1103 ft · 15 sec
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6
Take the exit slight left toward I 86 West
3220 ft · 1 min
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7
Continue straight
62.7 mi · 59 min
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8
Continue on Vietnam Veterans Memorial Highway
166.5 mi · 2 hr 36 min · Vietnam Veterans Memorial Highway
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9
Take the exit slight right toward US 20, US 26: Broadway Avenue
1402 ft · 34 sec · Idaho Medal of Honor Highway
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10
Keep slight right to continue on Idaho Medal of Honor Highway
134 m · 13 sec · Idaho Medal of Honor Highway
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11
Turn right onto South Broadway Avenue
2.9 mi · 6 min · South Broadway Avenue
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12
Turn left onto East Front Street
1 km · 2 min · East Front Street
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13
Turn right
17 m · 4 sec
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14
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Montpelier and Boise.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
Vietnam Veterans Memorial Highway
Continue on Vietnam Veterans Memorial Highway
166 mi · 02h 36m
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.
Mostly Sunny leaving Montpelier and Sunny near Boise.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Montpelier to Boise?
The road trip is about 321.9 miles (518 km) and usually takes 04h 46m 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?
Heyburn is a useful midpoint, sitting about 160.7 miles from Montpelier and 161.1 miles from Boise.
How much longer is the road route than the straight-line distance?
The direct path is about 263.5 miles (424.1 km), while the road route adds roughly 58.4 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 6:00 AM to 8:00 AM MDT. If you want a more comfortable same-day return, try to leave by 7:26 AM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $44.22 one way or $88.45 round trip. Estimated CO2 is about 101 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Montpelier and Sunny near Boise.
Stop Ideas Near Heyburn
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 Heyburn.
Twin Falls, Idaho
Flight Path Map
This map shows the direct air route between Montpelier and Boise. Straight-line distance: 263.54 mi (424.12 km).
#1 Montpelier
City in Bear Lake County, Idaho, United States
| Population | 2,538 |
| Coordinates | 42.3221500, -111.2977000 |
| Altitude | 1823 |
| Country | United States |
#2 Boise
The capital of Idaho.
| Population | 228,959 |
| Coordinates | 43.6135000, -116.2034500 |
| Altitude | 823 |
| Country | United States |
End: (-116.203299, 43.613424)
Estimated Travel Time
Distance: 518 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 10h 43m |
| 40 mph (64.37 km/h) | 08h 02m |
| 50 mph (80.47 km/h) | 06h 26m |
| 60 mph (96.56 km/h) | 05h 21m |
| 70 mph (112.65 km/h) | 04h 35m |
| 80 mph (129 km/h) | 04h 00m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $44.22 | $88.45 |
| Mid-grade | $4.23 | $48.06 | $96.13 |
| Premium | $4.55 | $51.68 | $103.35 |
| Diesel | $5.41 | $61.48 | $122.96 |
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 Idaho · May 31, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.