Osburn to Boise is 401 miles and takes about 9 hours 4 minutes via US 95, with a fuel budget near $61 and enough daylight to finish in a day, but is best enjoyed over two days. This drive stays within the Mountain West region, offering a consistent feel as you traverse Idaho. While it's primarily a highway route, breaking it into two days allows for a more relaxed pace. Consider this trip if you're looking for a straightforward drive with minimal navigation challenges, connecting two points in Idaho efficiently.
Trip Pace
Best split across 2 days
Treat the return leg as its own travel day rather than an afterthought.
Break Rhythm
2 planned breaks
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
200.5 miles from Osburn, ID
A natural place for your longest stop of the day
, about 4h 37m into the drive
.
Main Roads
Road
Distance
Duration
US 95
136.6 mi
2h 37m
South 3rd Street
45.7 mi
1h 1m
South Highway 3
32.6 mi
48m
ID 55
31.1 mi
46m
I 90
22.6 mi
22m
Highway 3
20.2 mi
29m
State Highway 6
15.9 mi
24m
Highway 55
15 mi
20m
Longest stretch:
US 95
— 136.6 mi, about 2h 37m
Traffic on I-90
Hour-of-day weekday pattern from 16 FHWA count stations on your route.
Peak
4 PM
~563 veh/hr typical
· worst 815
Quietest
2 AM
~41 veh/hr
Peak-to-quiet ratio
13.7×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 75 weeks of 2023 FHWA Travel Monitoring Analysis System data. Weekday hours only (Mon–Fri).
Turn-by-Turn Driving Directions
Step-by-step road directions between Osburn, ID and Boise, ID.
1
Start on I 90 Business
0.2 mi·29 sec·North 3rd Street
2
Take the ramp
0.2 mi·28 sec
3
Merge onto I 90
23 mi·22 min·I 90
4
Take the exit
0.2 mi·30 sec
Toward ID 3: Harrison, Rose Lake, Saint Maries
5
Turn left onto ID 3
33 mi·48 min·South Highway 3
6
Continue on ID 3
522 ft·15 sec·South 3rd Street
7
Turn left onto ID 3
0.1 mi·15 sec·College Avenue
8
Continue on ID 3
14 mi·25 min·Highway 3 South
9
Keep slight right at fork onto ID 6
8.2 mi·14 min·State Highway 6
10
Continue on ID-6
9.3 mi·16 min·ID-6
11
Continue on ID 6
7.7 mi·10 min·State Highway 6
12
Turn left onto ID 9
13 mi·18 min·State Highway 9
13
At end of road, turn left onto ID 8
0.2 mi·15 sec·State Highway 8
14
Continue on ID 8
0.6 mi·1 min·West 2nd Avenue
15
Turn right onto Wyoming Street
0.4 mi·51 sec·Wyoming Street
16
Continue on ID 3
15 mi·20 min·Highway 3
17
Continue on ID 3
1.2 mi·2 min·Main Street
18
Continue on ID 3
2.9 mi·5 min·Highway 3
19
Continue on ID 3
0.6 mi·1 min·Main Street
20
Continue on ID 3
2.4 mi·4 min·Highway 3
21
Continue on ID 3
6.3 mi·11 min·State Highway 3
22
Continue on ID 3
156 ft·8 sec·State Highway 3
23
Turn right onto US 12
4.7 mi·5 min·Arrow Bridge
24
Merge onto US 95
60 mi·1 hr 10 min·US 95
25
Turn right onto Johnston Road
2.2 mi·5 min·Johnston Road
26
Turn right onto US 95
76 mi·1 hr 26 min·US 95
27
Turn left onto ID 55
11 mi·16 min·ID 55
28
Turn right onto Boydstun Street
0.9 mi·1 min·Boydstun Street
29
Continue on East Deinhard Lane
1.6 mi·2 min·East Deinhard Lane
30
Turn right onto ID 55
46 mi·1 hr 1 min·South 3rd Street
31
Continue on ID 55
18 mi·25 min·ID 55
32
Continue on ID 55
13 mi·17 min·Highway 55
33
Continue on ID 55
1.3 mi·1 min·Horseshoe Bend Road
34
Continue on ID 55
2.0 mi·5 min·ID 55
35
Continue on ID 55
0.4 mi·29 sec·Horseshoe Bend Road
36
Continue on ID 55
2.4 mi·3 min·Highway 55
37
Continue on ID 55
5.9 mi·7 min·Payette River Scenic Byway
38
Continue on ID 55
8.9 mi·12 min·North Horseshoe Bend Road
39
Turn left onto ID 44
5.4 mi·9 min·East State Street
Use the left / straight lanes.
40
Keep slight right at fork onto West State Street
2.4 mi·6 min·West State Street
41
Turn right onto North 6th Street
0.4 mi·1 min·North 6th Street
42
Turn right onto US 20; US 26
263 ft·8 sec·West Front Street
43
Turn right
55 ft·4 sec
44
Arrive at destination
Trip Plan
With a duration of nearly 10 hours, planning for two days is highly recommended to avoid fatigue. Aim to depart early on your first day, perhaps around 8 AM, to maximize daylight. The longest stretch without a stop is over 136 miles on US 95, so be sure to fuel up before you begin that segment. Plan your overnight stop roughly halfway through the 401 miles to break up the driving. With only two recommended stops, ensure they are strategically placed for rest and any necessary provisions.
Morning Departure
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Evening Departure
This is a long drive — plan for a morning departure or consider splitting it into two days.
This drive is better paced as a 2-day trip.
Plan roughly 2 meaningful breaks for fuel, food, and rest.
The halfway point lands around 200.5 miles from Osburn, ID, or about 4h 37m into the drive.
The longest continuous stretch on this route runs about 136.6 miles.
Consider an overnight stop or starting very early.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 88 miles or 2h 9m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 200.5 miles or 4h 37m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Overnight split
Day 1 wrap after about 200.5 miles or 4h 37m
Stop before fatigue turns the last few hours into a grind. You want day two to start fresh, not just resumed.
Final approach
Final hour starts around 7h 35m
Traffic, exits, and arrival timing usually matter more near Boise, ID than in the middle of the route.
Before You Leave
+
Open the route before leaving Osburn, 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.
+
Pick one backup stop option before the midpoint in case traffic changes your pacing.
+
Treat this as a 2-day road trip and book the overnight stop before the busiest arrival window.
Day 1
Settle into the route from Osburn, ID
Aim for roughly 201 miles and 4.5 hours of wheel time on this day.
Day 2
Finish the approach into Boise, ID
Aim for roughly 201 miles and 4.5 hours of wheel time on this day.
Your first comfortable stop window is around 88 miles from Osburn, ID.
This route usually feels better as a 2-day drive than as one long push.
Plan about 2 real breaks rather than only quick fuel stops.
The longest stretch is on US 95 for about 136.6 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 21
5 decision points cluster between mile 0.2 and 392.8 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
4
0.2 mi into trip|~0m in
Take the ramp
Navigation decision point
5
23 mi into trip|~23m in
Take the exit toward ID 3: Harrison, Rose Lake, Saint Maries
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward ID 3: Harrison, Rose Lake, Saint Maries
4
23.2 mi into trip|~24m in|ID 3 / South Highway 3
Turn left onto ID 3 / South Highway 3
Navigation decision point
5
108.9 mi into trip|~2h 37m in|ID 8 / State Highway 8
At end of road, turn left onto ID 8 / State Highway 8
Navigation decision point
5
392.8 mi into trip|~8h 47m in|ID 44 / East State Street
Turn left onto ID 44 / East State Street
Lane positioning matters here
Use the left / straight lanes.
Fuel & Cost
Regular Gas
$69.54 one way
$139.09 round trip
$4.41/gal25.4 MPG avg140 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.61
$72.73
$145.47
premium
$4.95
$78.15
$156.30
diesel
$5.60
$88.39
$176.79
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$70
Hotel (1n)
$80–$140
Meals
$50–$100
Total
$200–$310
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 140.3 kg one way.
Prices: EIA weekly data, 2026-08-31.
Driving Electric?
About $42 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
120.3
1
$42.11
$19.25
Efficient EV
100.3
1
$35.09
$16.04
EV Truck/SUV
160.4
2
$56.14
$25.66
Gas CO2
140 kg
EV CO2
47 kg (66% less)
Plan for 1 charging stop. A 30-minute DC fast charge mid-route should be enough to complete the trip comfortably.
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 Aug 30, 2026
Origin
Osburn, ID
Late night
in Osburn on Friday
Local time
3:13 AM
PDT
Current temp
67°F
Mostly Sunny
SW 2 to 12 mph14% chanceLive forecast
Destination
Boise, ID
Late night
in Boise on Friday
Local time
4:13 AM
MDT
Current temp
78°F
Sunny
WNW 2 to 6 mph0% chanceLive forecast
87°F
Lewiston, ID
201 mi in
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.
For long drives, weather on day two can matter just as much as conditions at departure, so check the whole travel window rather than only the first day.
Time zone
1 hour later
The destination clock does not match departure time, so double-check hotel check-in windows and late arrival plans.
Temperature spread
11 degrees warmer at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
9h 4m on the road
This is long enough that the arrival forecast matters almost as much as departure conditions. Recheck both ends before you roll.
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...
20 mi from route
~50 min detour
Free
near mile 207.4
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This route is mostly highway, with 79% of the drive on main roads like US 95. You'll encounter a longest stretch of 136.6 miles on US 95, which is a good portion of uninterrupted driving. Expect to transition from highway cruising to surface streets as you approach your destination, with South 3rd Street and South Highway 3 guiding you into Boise. The profile is mostly highway, suggesting a consistent cruising speed for much of the trip.
79% highway — fuel and pacing are the main things to plan.
44 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 136.6 mi on US 95.
How Hard Is This Drive?
5/10
This is a straightforward highway drive that stays mostly on US 95 and South 3rd Street. You will hit about 21 points where you need to pay attention to lane position or signs. The trickiest moment comes around 0.2 miles in.
Driving Effort5/10
Moderate - straightforward overall, but long enough or busy enough to require pacing
Balances navigation complexity with total wheel time.
This drive requires moderate attention. Across 401 miles you will encounter 21 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.
Where does it get tricky?
The main spots that need attention: at 0.2 miles: Navigation decision point; at 23 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 23.2 miles (ID 3 / South Highway 3): Navigation decision point.
Elevation Profile
High-altitude sections with notable climbs
4,853 ft819 ft
Total Climb
7,088 ft
Total Descent
6,910 ft
Highest Point
4,853 ft
~335.8 mi in
Elevation Range
4,033 ft
Notable High Points
3,863 ft at ~183.2 miles+553 ft prominence
4,853 ft at ~335.8 miles+306 ft prominence
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Osburn, ID and Boise, ID, road signs point toward Rose Lake and Saint Maries.
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.
Top landmarks
•Idaho State Capitol — Idaho state capitol building in Boise, Idaho, U.S.A.
•Cathedral of St. John the Evangelist — church in Idaho, United States
•Morris Hill Cemetery Mausoleum — mausoleum in Morris Hill Cemetery, Boise, Idaho
Moderate complexity with 2 natural rest stops along the way.
Solo Traveler
9h 4m drive, plan rest stops for pacing.
First-Time Driver
Mostly highway driving (79%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 136.6 miles on US 95. The full list of main roads is in the Roads section above.
Yes — a 2-day pace is more comfortable than one long haul. A sensible stopping point is after roughly 201 miles on day one.
Yes — we found about 2 rest areas or service plazas within a short detour of the route (from OpenStreetMap). See the Rest Stops tab under Nearby Places for locations and mile markers. Plan to stretch, use the bathroom, and top off fluids every 2–3 hours on longer drives.
It helps. This is a long drive, so arriving tired and in the dark compounds. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Boise, ID before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 2 meaningful breaks. There are 2 rest areas along the route for bathroom stops.
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: at 0.2 miles: Navigation decision point; at 23 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 23.2 miles (ID 3 / South Highway 3): Navigation decision point.
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 9.1 hours each way, a round trip means 18.2 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Boise, ID before the return drive.
