How far is Boise, ID from Challis, ID?
The driving distance from Boise, ID to Challis, ID is about 190.7 miles (306.9 km), with a travel time of about 04h 44m by car.
- The straight-line flight distance is about 115.6 miles (186.1 km).
- For a round trip, plan for roughly 09h 29m 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 44m.
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.
Mostly Sunny then Chance Snow Showers
Driving Route Map
The map below follows the saved road route between Boise and Challis.
Turn-by-Turn Driving Directions
Step-by-step road directions between Boise and Challis.
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1
Start on the route
36 m · 14 sec
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2
Turn left
39 m · 11 sec
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3
At the end of the road, turn right onto South Capitol Boulevard
849 ft · 34 sec · South Capitol Boulevard
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4
Turn left onto West Idaho Street
3037 ft · 1 min · West Idaho Street
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5
Turn right onto North 15th Street
1019 ft · 30 sec · North 15th Street
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6
Turn left onto West State Street
1.4 km · 2 min · West State Street
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7
Continue on West State Street
656 ft · 20 sec · West State Street
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8
Keep slight left to continue on West State Street
6.1 mi · 11 min · West State Street
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9
Take the ramp slight right toward SH-55
156 m · 14 sec
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10
Merge slight left onto North Horseshoe Bend Road
8.8 mi · 12 min · North Horseshoe Bend Road
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11
Continue on Payette River Scenic Byway
5.9 mi · 7 min · Payette River Scenic Byway
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12
Continue on Highway 55
2.4 mi · 3 min · Highway 55
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13
Continue on Horseshoe Bend Road
2105 ft · 30 sec · Horseshoe Bend Road
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14
Continue on Highway 55
16 mi · 24 min · Highway 55
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15
Continue on Horseshoe Bend Road
109 m · 8 sec · Horseshoe Bend Road
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16
Turn right onto Banks Lowman Road
33.3 mi · 59 min · Banks Lowman Road
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17
Turn left onto Ponderosa Pine Scenic Route
32.8 mi · 45 min · Ponderosa Pine Scenic Route
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18
Continue on State Highway 21
24.4 mi · 28 min · State Highway 21
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19
Continue on Eva Falls Avenue
1 mi · 2 min · Eva Falls Avenue
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20
At the end of the road, turn left onto Salmon River Scenic Byway
54.9 mi · 1 hr 22 min · Salmon River Scenic Byway
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21
At the end of the road, turn left onto South Salmon River Scenic Byway
2.1 mi · 3 min · South Salmon River Scenic Byway
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22
Turn left onto East Valley Avenue
2264 ft · 2 min · East Valley Avenue
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23
Turn right onto South 7th Street
101 m · 16 sec · South 7th Street
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24
Turn right
41 m · 10 sec
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25
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Boise and Challis.
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
At the end of the road, turn left onto Salmon River Scenic Byway
54.9 mi · 01h 22m
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.
Sunny leaving Boise and Mostly Sunny then Chance Snow Showers near Challis.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Boise to Challis?
The road trip is about 190.7 miles (306.9 km) and usually takes 04h 44m 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 95.3 miles from Boise and 95.4 miles from Challis.
How much longer is the road route than the straight-line distance?
The direct path is about 115.6 miles (186.1 km), while the road route adds roughly 75.1 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 7:30 AM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $26.20 one way or $52.40 round trip. Estimated CO2 is about 59.8 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Boise and Mostly Sunny then Chance Snow Showers near Challis.
Flight Path Map
This map shows the direct air route between Boise and Challis. Straight-line distance: 115.65 mi (186.12 km).
#1 Boise
The capital of Idaho.
| Population | 228,959 |
| Coordinates | 43.6135000, -116.2034500 |
| Altitude | 823 |
| Country | United States |
#2 Challis
City in Custer County, Idaho, United States
| Population | 1,091 |
| Coordinates | 44.5046400, -114.2317300 |
| Altitude | 1601 |
| Country | United States |
End: Challis (-114.23173, 44.50464)
Estimated Travel Time
Distance: 307 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 06h 21m |
| 40 mph (64.37 km/h) | 04h 46m |
| 50 mph (80.47 km/h) | 03h 48m |
| 60 mph (96.56 km/h) | 03h 10m |
| 70 mph (112.65 km/h) | 02h 43m |
| 80 mph (129 km/h) | 02h 22m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $26.20 | $52.40 |
| Mid-grade | $4.23 | $28.47 | $56.95 |
| Premium | $4.55 | $30.61 | $61.23 |
| Diesel | $5.41 | $36.42 | $72.85 |
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 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.