The drive from Boise, ID to Saint Maries, ID covers 344.3 miles and takes about 7h 51m behind the wheel.
This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on North Norris Avenue, US 95, Main Street for much of the mileage,
and the overall profile is mixed drive.
The longest uninterrupted segment is about 76.4 miles on North Norris Avenue.
At current regular gas prices, budget about $54.56 one way before food or hotel costs.
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
2 planned breaks
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
172.1 miles from Boise, ID
A natural place for your longest stop of the day
, about 3h 52m into the drive
.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 7h 51m. Total distance: 344.3 miles.
Family Friendly
Moderate complexity with 2 natural rest stops along the way.
Solo Traveler
7h 51m drive, plan rest stops for pacing.
Drive Character
The drive from Boise, ID to Saint Maries, ID covers 344.3 miles and takes about 7h 51m, using a mix of highways and local roads.
Expect a mix of faster highway mileage and slower local approaches near the beginning or end.
There are about 44 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
North Norris Avenue is the longest continuous segment at about 76.4 miles.
How Hard Is This Drive?
This route mixes highway mileage with some local-road sections near the start or finish. You will hit about 22 points where you need to pay attention to lane position or signs. The trickiest moment comes early in the drive.
Driving Effort6/10
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 344.3 miles you will encounter 22 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: 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.
Critical Maneuvers
5 of 22 key points
These are the spots where you need to pay the most attention. Preview them before you drive.
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.
Main Roads
Road
Distance
Duration
North Norris Avenue
76.4 mi
1h 26m
US 95
59.9 mi
1h 9m
Main Street
47.4 mi
1h 5m
Highway 3
20.2 mi
29m
Horseshoe Bend Road
18.9 mi
25m
Highway 55
18.4 mi
27m
State Highway 6
15.9 mi
24m
Highway 3 South
14.3 mi
25m
Longest stretch:
North Norris Avenue
— 76.4 mi, about 1h 26m
Turn-by-Turn Driving Directions
Step-by-step road directions between Boise, ID and Saint Maries, 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
76 mi·1 hr 26 min·North Norris Avenue
21
Turn left onto Johnston Road
2.2 mi·5 min·Johnston Road
22
At end of road, turn left onto US 95
60 mi·1 hr 9 min·US 95
23
Take the exit
0.3 mi·57 sec
Toward US 12 East
24
Merge onto US 12
4.1 mi·4 min·US 12
25
Turn left onto ID 3
156 ft·7 sec·State Highway 3
26
Continue on ID 3
6.3 mi·11 min·State Highway 3
27
Continue on ID 3
2.4 mi·4 min·Highway 3
28
Continue on ID 3
0.6 mi·1 min·Main Street
29
Continue on ID 3
2.9 mi·5 min·Highway 3
30
Continue on ID 3
1.2 mi·2 min·Main Street
31
Continue on ID 3
15 mi·20 min·Highway 3
32
Continue on Wyoming Street
0.4 mi·55 sec·Wyoming Street
33
At end of road, turn left onto 2nd Avenue
0.6 mi·1 min·2nd Avenue
34
Continue on ID 8
0.2 mi·17 sec·State Highway 8
35
Turn right onto ID 9
13 mi·18 min·State Highway 9
36
At end of road, turn right onto ID 6
7.7 mi·10 min·State Highway 6
37
Continue on ID-6
9.3 mi·16 min·ID-6
38
Continue on ID 6
8.0 mi·14 min·State Highway 6
39
Keep slight left at fork onto ID 6
0.2 mi·22 sec·State Highway 6
40
Turn straight onto ID 3
14 mi·25 min·Highway 3 South
41
Continue on ID 3
0.1 mi·22 sec·East College Avenue
42
Turn left onto South 3rd Street
359 ft·17 sec·South 3rd Street
43
Turn right onto West Jefferson Avenue
49 ft·2 sec·West Jefferson Avenue
44
Arrive at destination
West Jefferson Avenue
Trip Plan
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.
You can normally do this drive in one day.
Plan roughly 2 meaningful breaks for fuel, food, and rest.
The halfway point lands around 172.1 miles from Boise, ID, or about 3h 52m into the drive.
The longest continuous stretch on this route runs about 76.4 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 76 miles or 1h 50m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 172.1 miles or 3h 52m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 6h 15m
Traffic, exits, and arrival timing usually matter more near Saint Maries, 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.
+
Pick one backup stop option before the midpoint in case traffic changes your pacing.
Day 1
Settle into the route from Boise, ID
This is one driving day of about 344.3 miles and 7h 51m.
Your first comfortable stop window is around 76 miles from Boise, ID.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 2 real breaks rather than only quick fuel stops.
The longest stretch is on North Norris Avenue for about 76.4 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 172.1 mi from Boise, ID
· 3h 52m into the drive
Place data sourced from public business listings. Hours and availability may vary.
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
~49 min detour
Free
near mile 201.8
Park data from the National Park Service API. Alerts update every 2 hours.
Fuel & Cost
Regular Gas
$54.56 one way
$109.12 round trip
$4.03/gal25.4 MPG avg121 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.22
$57.19
$114.38
premium
$4.53
$61.42
$122.84
diesel
$5.61
$76.02
$152.03
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$55
Meals
$25–$50
Total
$80–$105
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 120.5 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $36 in charging
· 1 stop
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
103.3
1
$36.15
$16.53
Efficient EV
86.1
0
$30.13
$13.77
EV Truck/SUV
137.7
1
$48.20
$22.04
Gas CO2
120 kg
EV CO2
40 kg (67% 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 Apr 15, 2026
Origin
Boise, ID
Night
in Boise on Friday
Local time
11:03 PM
MDT
Current temp
62°F
Unavailable
Live forecast
Destination
Saint Maries, ID
Night
in Saint Maries on Friday
Local time
10:03 PM
PDT
Current temp
44°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
18 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
7h 51m on the road
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
Frequently Asked Questions
The drive from Boise, ID to Saint Maries, ID covers 344.3 miles and takes about 7h 51m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are North Norris Avenue, US 95, Main Street. Expect a mix of highway and local road driving.
This is a comfortable same-day trip.
The midpoint is about 172.1 miles from Boise, ID. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $54.56 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
Start early — leave by 6-7 AM to arrive at a reasonable hour. This is a long drive — plan for a morning departure or consider splitting it into two days.
Plan about 2 meaningful breaks for fuel, food, or rest. Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
This drive requires moderate attention. Across 344.3 miles you will encounter 22 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.
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.
The route from Boise, ID to Saint Maries, ID does not surface many named destination signs beyond the main corridor.
