How far is Salmon, ID from Boise, ID?
The driving distance from Salmon, ID to Boise, ID is about 247.7 miles (398.7 km), with a travel time of about 05h 06m by car.
- The straight-line flight distance is about 156.9 miles (252.5 km).
- For a round trip, plan for roughly 10h 13m 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 05h 06m.
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 Custer County, Idaho, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Chance Rain And Snow
Slight Chance Rain Showers
Driving Route Map
The map below follows the saved road route between Salmon and Boise.
Turn-by-Turn Driving Directions
Step-by-step road directions between Salmon and Boise.
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1
Start on South Saint Charles Street
63 m · 11 sec · South Saint Charles Street
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2
Turn right onto Main Street
2394 ft · 46 sec · Main Street
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3
Turn right onto South Challis Street
2152 ft · 36 sec · South Challis Street
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4
Continue on Salmon River Scenic Byway
59.9 mi · 1 hr 20 min · Salmon River Scenic Byway
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5
Continue on Salmon River Scenic Byway
54.9 mi · 1 hr 22 min · Salmon River Scenic Byway
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6
Turn right onto Eva Falls Avenue
1 mi · 2 min · Eva Falls Avenue
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7
Continue on State Highway 21
24.4 mi · 28 min · State Highway 21
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8
Continue on Ponderosa Pine Scenic Route
32.8 mi · 45 min · Ponderosa Pine Scenic Route
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9
Turn right onto Banks Lowman Road
33.3 mi · 59 min · Banks Lowman Road
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10
Turn left onto Horseshoe Bend Road
109 m · 6 sec · Horseshoe Bend Road
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11
Continue on Highway 55
12.6 mi · 17 min · Highway 55
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12
Continue on Horseshoe Bend Road
1.3 mi · 2 min · Horseshoe Bend Road
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13
Continue on ID 55
2 mi · 5 min · ID 55
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14
Continue on Horseshoe Bend Road
2105 ft · 30 sec · Horseshoe Bend Road
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15
Continue on Highway 55
2.4 mi · 3 min · Highway 55
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16
Continue on Payette River Scenic Byway
5.9 mi · 7 min · Payette River Scenic Byway
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17
Continue on North Horseshoe Bend Road
8.9 mi · 12 min · North Horseshoe Bend Road
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18
Turn left onto East State Street
5.4 mi · 10 min · East State Street
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19
Keep slight right to continue on West State Street
2.4 mi · 6 min · West State Street
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20
Turn right onto North 6th Street
2057 ft · 1 min · North 6th Street
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21
Turn right onto West Front Street
80 m · 8 sec · West Front Street
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22
Turn right
17 m · 4 sec
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23
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Salmon and Boise.
Straightforward drive
The saved road route has a manageable number of maneuvers and should be easy to follow with normal attention to signs.
Salmon River Scenic Byway
Continue on Salmon River Scenic Byway
59.9 mi · 01h 20m
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.
Chance Rain And Snow leaving Salmon and Slight Chance Rain Showers near Boise.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Salmon to Boise?
The road trip is about 247.7 miles (398.7 km) and usually takes 05h 06m 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?
Stanley is a useful midpoint, sitting about 124.4 miles from Salmon and 123.3 miles from Boise.
How much longer is the road route than the straight-line distance?
The direct path is about 156.9 miles (252.5 km), while the road route adds roughly 90.8 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 6:46 AM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $34.02 one way or $68.05 round trip. Estimated CO2 is about 77.7 kg one way.
What should you check before leaving?
Before you leave, expect Chance Rain And Snow around Salmon and Slight Chance Rain Showers near Boise.
Flight Path Map
This map shows the direct air route between Salmon and Boise. Straight-line distance: 156.93 mi (252.55 km).
#1 Salmon
City in Lemhi County, Idaho, United States
| Population | 3,169 |
| Coordinates | 45.1757500, -113.8959000 |
| Altitude | 1202 |
| 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: 399 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 08h 15m |
| 40 mph (64.37 km/h) | 06h 11m |
| 50 mph (80.47 km/h) | 04h 57m |
| 60 mph (96.56 km/h) | 04h 07m |
| 70 mph (112.65 km/h) | 03h 32m |
| 80 mph (129 km/h) | 03h 05m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $34.02 | $68.05 |
| Mid-grade | $4.23 | $36.98 | $73.96 |
| Premium | $4.55 | $39.76 | $79.52 |
| Diesel | $5.41 | $47.30 | $94.60 |
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 · 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.