How far is Ennis, MT from Boise, ID?
The driving distance from Ennis, MT to Boise, ID is about 432.2 miles (695.6 km), with a travel time of about 07h 25m by car.
- The straight-line flight distance is about 251 miles (403.9 km).
- For a round trip, plan for roughly 14h 51m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 7:30 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 07h 25m.
Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
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 Idaho
Route Weather Snapshot
Check the forecast at both ends before you head out.
Patchy Smoke then Sunny
Driving Route Map
The map below follows the saved road route between Ennis and Boise.
Turn-by-Turn Driving Directions
Step-by-step road directions between Ennis and Boise.
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1
Start on Main Street
40.3 mi · 45 min · Main Street
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2
Turn right
8.6 mi · 13 min
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3
Continue straight
9.1 mi · 12 min
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4
At the end of the road, turn right onto Idaho Medal of Honor Highway
58 mi · 1 hr 8 min · Idaho Medal of Honor Highway
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5
Continue on Yellowstone Highway
17.2 mi · 18 min · Yellowstone Highway
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6
Continue on Idaho Medal of Honor Highway
15.4 mi · 16 min · Idaho Medal of Honor Highway
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7
Continue on Rigby Highway
3.1 mi · 4 min · Rigby Highway
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8
Merge slight right onto Grandview Drive
575 ft · 14 sec · Grandview Drive
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9
Take the exit slight right toward I 15 South: Arco, Pocatello
1466 ft · 37 sec
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10
Merge slight left onto Veterans Memorial Highway
46.5 mi · 44 min · Veterans Memorial Highway
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11
Take the exit slight right toward I 86 West: Chubbuck, Twin Falls
1 km · 44 sec
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12
Continue straight
62.7 mi · 59 min
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13
Continue on Vietnam Veterans Memorial Highway
166.5 mi · 2 hr 36 min · Vietnam Veterans Memorial Highway
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14
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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15
Keep slight right to continue on Idaho Medal of Honor Highway
134 m · 13 sec · Idaho Medal of Honor Highway
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16
Turn right onto South Broadway Avenue
2.9 mi · 6 min · South Broadway Avenue
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17
Turn left onto East Front Street
1 km · 2 min · East Front Street
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18
Turn right
17 m · 4 sec
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19
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Ennis 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.
Better with a longer stop
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
Patchy Smoke then Sunny leaving Ennis and Mostly Sunny near Boise.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Ennis to Boise?
The road trip is about 432.2 miles (695.6 km) and usually takes 07h 25m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
What is the halfway point on this route?
American Falls is a useful midpoint, sitting about 215.9 miles from Ennis and 216.3 miles from Boise.
How much longer is the road route than the straight-line distance?
The direct path is about 251 miles (403.9 km), while the road route adds roughly 181.2 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 7:30 AM MDT. Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $59.37 one way or $118.74 round trip. Estimated CO2 is about 135.5 kg one way.
What should you check before leaving?
Before you leave, expect Patchy Smoke then Sunny around Ennis and Mostly Sunny near Boise.
Flight Path Map
This map shows the direct air route between Ennis and Boise. Straight-line distance: 250.97 mi (403.9 km).
#1 Ennis
Town in Madison County, Montana, United States
| Population | 1,042 |
| Coordinates | 45.3488200, -111.7297000 |
| Altitude | 1506 |
| Country | United States |
#2 Boise
The capital of Idaho.
| Population | 228,959 |
| Coordinates | 43.6135000, -116.2034500 |
| Altitude | 823 |
| Country | United States |
End: Boise (-116.20345, 43.6135)
Estimated Travel Time
Distance: 696 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 14h 24m |
| 40 mph (64.37 km/h) | 10h 48m |
| 50 mph (80.47 km/h) | 08h 38m |
| 60 mph (96.56 km/h) | 07h 12m |
| 70 mph (112.65 km/h) | 06h 10m |
| 80 mph (129 km/h) | 05h 23m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $59.37 | $118.74 |
| Mid-grade | $4.23 | $64.52 | $129.05 |
| Premium | $4.55 | $69.37 | $138.74 |
| Diesel | $5.41 | $82.53 | $165.07 |
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 · Aug 24, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.