This 232-mile journey from Boise to Kamiah, Idaho, is a manageable one-day trip, estimated to take around 5 hours and 2 minutes. With a fuel cost of approximately $37, it's an economical option for exploring the Mountain West region. The route primarily utilizes local roads like North Norris Avenue, Main Street, and Harpster Grade Road, making it a turn-heavy drive rather than a high-speed interstate cruise. The longest continuous stretch you'll encounter is 79 miles on North Norris Avenue. This drive offers a more intimate connection with the landscape compared to a highway-focused route, perfect for those who enjoy varied driving experiences.
Trip Pace
Same-day drive is realistic
A same-day return is possible, but it will make for a full day on the road.
Break Rhythm
1 planned break
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
116 miles from Boise, ID
A natural place for your longest stop of the day
, about 2h 47m into the drive
.
Main Roads
Road
Distance
Duration
North Norris Avenue
79 mi
1h 29m
Main Street
45.6 mi
1h 1m
Harpster Grade Road
25.2 mi
28m
Horseshoe Bend Road
18.9 mi
25m
Highway 55
18.4 mi
27m
West Lake Street
10.6 mi
16m
North Horseshoe Bend Road
8.8 mi
11m
US 12
7.6 mi
10m
Longest stretch:
North Norris Avenue
— 79 mi, about 1h 29m
Turn-by-Turn Driving Directions
Step-by-step road directions between Boise, ID and Kamiah, ID.
1
Start on this road
118 ft·14 sec·this road
2
Turn left
126 ft·11 sec
3
At end of road, turn right onto South Capitol Boulevard
0.2 mi·33 sec·South Capitol Boulevard
4
Turn left onto West Idaho Street
0.6 mi·1 min·West Idaho Street
Use the left / straight lanes.
5
Turn right onto North 15th Street
0.2 mi·29 sec·North 15th Street
Use the straight / left / right lanes.
6
Turn left onto West State Street
0.9 mi·2 min·West State Street
7
Continue on West State Street
0.1 mi·20 sec·West State Street
8
Keep slight left at fork onto West State Street
6.1 mi·11 min·West State Street
Use the straight lane.
9
Take the ramp
513 ft·14 sec
Toward SH-55
10
Merge onto ID 55
8.8 mi·11 min·North Horseshoe Bend Road
11
Continue on ID 55
5.9 mi·7 min·Payette River Scenic Byway
12
Continue on ID 55
2.4 mi·3 min·Highway 55
13
Continue on ID 55
0.4 mi·29 sec·Horseshoe Bend Road
14
Continue on ID 55
16 mi·24 min·Highway 55
15
Continue on ID 55
18 mi·25 min·Horseshoe Bend Road
16
Continue on ID 55
46 mi·1 hr 1 min·Main Street
17
Turn left onto Deinhard Lane
1.6 mi·2 min·Deinhard Lane
18
Continue on Boydstun Street
0.9 mi·1 min·Boydstun Street
19
At end of road, turn left onto ID 55
11 mi·16 min·West Lake Street
20
Turn right onto US 95
79 mi·1 hr 29 min·North Norris Avenue
21
Turn right onto ID 13
1.1 mi·1 min·West Main Street
22
Continue on ID 13
25 mi·28 min·Harpster Grade Road
23
At end of road, turn left onto US 12
7.6 mi·10 min·US 12
24
Turn left onto ID 64; ID 162
0.1 mi·14 sec·Hill Street
25
Arrive at destination
Hill Street
Trip Plan
Given the 5-hour duration, this drive is best tackled in a single day, allowing you to depart Boise in the morning and arrive in Kamiah by the afternoon. Plan for one stop to break up the 232 miles and refuel if needed, as the longest stretch without a significant change in road type is 79 miles. Keep an eye on your fuel gauge, especially as you transition onto local roads like Harpster Grade Road, where services might be less frequent. The 'turn-heavy' nature of this route means staying attentive and enjoying the journey itself is key.
Morning Departure
An early start around 7-8 AM gets you there with plenty of daylight left.
Evening Departure
A late afternoon start means arriving after dark. Morning is better.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 116 miles from Boise, ID, or about 2h 47m into the drive.
The longest continuous stretch on this route runs about 79 miles.
This is a comfortable same-day trip.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 51 miles or 1h 16m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 116 miles or 2h 47m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 4h 12m
Traffic, exits, and arrival timing usually matter more near Kamiah, ID than in the middle of the route.
Before You Leave
+
Open the route before leaving Boise, ID so your first major turns are already loaded.
+
Leave with enough water and a charging cable within reach, not packed away.
+
Check your fuel range against the first long segment, especially if you are starting outside city service areas.
Day 1
Settle into the route from Boise, ID
This is one driving day of about 232 miles and 5h 2m.
Your first comfortable stop window is around 51 miles from Boise, ID.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 1 real break rather than only quick fuel stops.
The longest stretch is on North Norris Avenue for about 79 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 14
5 decision points cluster between mile 0 and 2 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
5
0 mi into trip|~0m in
Turn left
Navigation decision point
6
0 mi into trip|~0m in|South Capitol Boulevard
At end of road, turn right onto South Capitol Boulevard
Complex interchange - multiple decisions in a short stretch
5
0.2 mi into trip|~0m in|West Idaho Street
Turn left onto West Idaho Street
Lane positioning matters here
Use the left / straight lanes.
6
0.8 mi into trip|~2m in|North 15th Street
Turn right onto North 15th Street
Lane positioning matters here
Use the straight / left / right lanes.
6
2 mi into trip|~5m in|West State Street
Keep slight left at fork onto West State Street
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight lane.
Fuel & Cost
Regular Gas
$36.76 one way
$73.53 round trip
$4.03/gal25.4 MPG avg81 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.22
$38.54
$77.07
premium
$4.53
$41.39
$82.77
diesel
$5.61
$51.22
$102.45
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$37
Meals
$25–$50
Total
$62–$87
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 81.2 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $24 in charging
· 0 stops
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
69.6
0
$24.36
$11.14
Efficient EV
58
0
$20.30
$9.28
EV Truck/SUV
92.8
1
$32.48
$14.85
Gas CO2
81 kg
EV CO2
27 kg (67% less)
Plan for 0 charging stops, roughly every 270 miles. Allow 25-40 minutes per stop at a DC fast charger.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Travel Intel
Current conditions at both ends of the drive.
Forecast as of Apr 15, 2026
Origin
Boise, ID
Night
in Boise on Saturday
Local time
10:16 PM
MDT
Current temp
62°F
Unavailable
Live forecast
Destination
Kamiah, ID
Night
in Kamiah on Saturday
Local time
9:16 PM
PDT
Current temp
47°F
Unavailable
Live forecast
Seasonal Notes
Summer travel usually means heavier construction, hotter rest stops, and busier weekend traffic around major cities.
Winter travel shortens daylight, so a route that looks manageable on paper can feel much longer after dark.
Holiday weekends tend to make both departure and arrival windows slower than the raw route time suggests.
Time zone
1 hour earlier
The destination clock does not match departure time, so double-check hotel check-in windows and late arrival plans.
Temperature spread
15 degrees cooler at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
5h 2m on the road
An early start around 7-8 AM gets you there with plenty of daylight left.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
National Parks Near This Route
Worth a detour if your schedule allows.
Nez Perce National Historical Park
National Historical Park
Since time immemorial, the valleys, prairies, mountains, and plateaus of the inland northwest have been home to the nimíipuu (Nez Perce) people. Extremely resilient, they survived the settling of the...
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
Expect a 'turn-heavy local drive' for most of this 232-mile route, with only about 11% of the journey on highways. The character shifts from city streets to more rural and winding local roads. You'll experience the longest uninterrupted stretch of 79 miles on North Norris Avenue, which will give you a good feel for the local terrain. This isn't a route for setting speed records; instead, it's designed for a more engaging driving experience, allowing you to appreciate the transition between different types of Idaho landscapes as you navigate.
Only 11% highway — the rest is turn-by-turn surface driving.
25 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 79 mi on North Norris Avenue.
How Hard Is This Drive?
4/10
Expect a hands-on drive with frequent turns and local roads rather than long highway stretches. There are only a few real navigation decisions along the way. The trickiest moment comes early in the drive.
Driving Effort4/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
This is a straightforward 5h 2m drive. You will face about 14 decision points, but nothing that requires special attention if you follow navigation.
Where does it get tricky?
The main spots that need attention: near the start: Navigation decision point; near the start (South Capitol Boulevard): Complex interchange - multiple decisions in a short stretch; at 0.2 miles (West Idaho Street): Lane positioning matters here.
Boise is the capital and largest city of Idaho. Boise offers numerous recreational opportunities, including extensive hiking and biking in the foothills to the immediate north of downtown. Boise is a regional hub for jazz, theater, and indie music, and is home to several museums.
Mostly surface roads route profile with national parks nearby.
Frequently Asked Questions
The longest stretch is about 79 miles on North Norris Avenue. The full list of main roads is in the Roads section above.
We did not find dedicated rest areas on this route. For a drive this long, plan bathroom and stretch breaks around gas stations, fast-food stops, or small-town downtowns — check the Nearby Places section for options.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 1 meaningful breaks. Dedicated rest areas are limited, so plan gas or food stops as your bathroom breaks.
Mostly yes along the main roads, but rural stretches through ID can have sparse or no coverage. Before you leave, download offline Google Maps or Apple Maps for the route, and consider downloading music or podcasts instead of streaming. If you depend on data for navigation, keep a paper backup of the turn-by-turn directions.
The main spots that need attention: near the start: Navigation decision point; near the start (South Capitol Boulevard): Complex interchange - multiple decisions in a short stretch; at 0.2 miles (West Idaho Street): Lane positioning matters here.
Yes — Nez Perce National Historical Park. See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 5.0 hours each way, a round trip means 10.1 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Kamiah, ID before the return drive.
