This 436.9-mile journey from Post Falls to Eagle, Idaho, will take approximately 8 hours and 5 minutes of driving time. Given the duration and the nature of the route, it's best planned as a two-day trip rather than a single day's drive. You can expect to spend around $69 on fuel for this entire trip. The drive primarily utilizes Old Oregon Trail Highway and Thomas S. Foley Memorial Highway, with a 20% share of Interstate 90, offering a blend of road types. Both your origin and destination are within the Mountain West region, so you'll experience consistent regional landscapes throughout.
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
218.4 miles from Post Falls, ID
A natural place for your longest stop of the day
, about 4h 7m into the drive
.
Who Is This Route For?
Solo Traveler
8h 5m drive, plan rest stops for pacing.
Scenic Drive
Turn-heavy local drive route profile.
Drive Character
This route is characterized as a "turn-heavy local drive," meaning you'll encounter frequent changes in direction and potentially navigate through more populated or winding areas. While 20% of the drive is on I-90, a significant portion will be on local roads. The longest uninterrupted stretch you'll experience is 215.2 miles on Old Oregon Trail Highway, which could offer a more consistent pace before transitioning to other road types. Prepare for a driving experience that requires more active navigation compared to a pure interstate cruise.
This route has more turning and local-road decision points than a simple highway run.
There are about 32 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
Old Oregon Trail Highway is the longest continuous segment at about 215.2 miles.
How Hard Is This Drive?
Expect a hands-on drive with frequent turns and local roads rather than long highway stretches. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 83.3 miles in near US 395 / Thomas S. Foley Memorial Highway.
Driving Effort7/10
Demanding - plan breaks and stay ahead of the key maneuvers
Balances navigation complexity with total wheel time.
This is a demanding drive. With 21 significant decision points across 436.9 miles, you will need to stay alert - especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
Where does it get tricky?
The main spots that need attention: at 83.3 miles (US 395 / Thomas S. Foley Memorial Highway): Highway fork - watch signs carefully. Multiple destination signs - pick the right one; at 157 miles (US 395): Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 159.4 miles (US 395 / Lewis and Clark Trail): Highway fork - watch signs carefully. Multiple destination signs - pick the right one.
Critical Maneuvers
5 of 21 key points
These are the spots where you need to pay the most attention. Preview them before you drive.
6
83.3 mi into trip|~1h 33m in|US 395 / Thomas S. Foley Memorial Highway
Keep slight right at fork onto US 395 / Thomas S. Foley Memorial Highway toward Ritzville, Pasco
Highway fork - watch signs carefully. Multiple destination signs - pick the right one
Toward Ritzville, Pasco
5
157 mi into trip|~2h 53m in|US 395
Take the exit onto US 395 toward I 182 West, US 395 South: Richland, Pendleton
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward I 182 West, US 395 South: Richland, Pend...
6
159.4 mi into trip|~2h 56m in|US 395 / Lewis and Clark Trail
Keep slight right at fork onto US 395 / Lewis and Clark Trail toward US 395: Kennewick, Pendleton, Columbia Basin College, Tri Cities Airport
Highway fork - watch signs carefully. Multiple destination signs - pick the right one
Toward US 395: Kennewick, Pendleton, Columbia B...
7
188.2 mi into trip|~3h 31m in|US 395
Keep slight left at fork onto US 395 toward US 395 south, US 730: Umatilla, Hermiston, Irrigon
Highway fork - watch signs carefully. Multiple destination signs - pick the right one
Toward US 395 south, US 730: Umatilla, Hermisto...
6
419.3 mi into trip|~7h 40m in|US 20; US 26 / Idaho Medal of Honor Highway
Take the exit onto US 20; US 26 / Idaho Medal of Honor Highway toward US 20, US 26 East
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Exit 29
Toward US 20, US 26 East
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Post Falls, ID and Eagle, ID, road signs point toward Ritzville, Pasco, Pendleton, Columbia Basin College, Tri Cities Airport and Hermiston - among others.
Ritzville
83.3 mi in|~1h 33m|via US 395
Pasco
83.3 mi in|~1h 33m|via US 395
Pendleton
157 mi in|~2h 53m|via US 395
Columbia Basin College
159.4 mi in|~2h 56m|via US 395
Tri Cities Airport
159.4 mi in|~2h 56m|via US 395
Hermiston
188 mi in|~3h 31m|via US 395
Irrigon
188 mi in|~3h 31m|via US 395
Main Roads
Road
Distance
Duration
Old Oregon Trail Highway
215.2 mi
3h 48m
Thomas S. Foley Memorial Highway
73.7 mi
1h 19m
I 90
56.6 mi
1h
I 90 Bus
26.2 mi
31m
Lewis and Clark Trail Highway
23.7 mi
26m
Umatilla-Stanfield Highway
8.4 mi
9m
Idaho Medal of Honor Highway
8 mi
11m
Lewis and Clark Trail
5.7 mi
7m
Longest stretch:
Old Oregon Trail Highway
— 215.2 mi, about 3h 48m
Turn-by-Turn Driving Directions
Step-by-step road directions between Post Falls, ID and Eagle, ID.
1
Start on West 10th Avenue
0.2 mi·40 sec·West 10th Avenue
2
Turn right onto North Spokane Street
0.3 mi·59 sec·North Spokane Street
3
Take the ramp onto I 90 Bus
26 mi·31 min·I 90 Bus
4
Keep slight left at fork onto I 90; US 395
57 mi·1 hr·I 90; US 395
5
Keep slight right at fork onto US 395
74 mi·1 hr 19 min·Thomas S. Foley Memorial Highway
Toward Ritzville, Pasco
6
Take the exit onto US 395
0.6 mi·1 min·US 395
Toward I 182 West, US 395 South: Richland, Pendleton
7
Merge onto I 182; US 12; US 395
1.9 mi·2 min·Lewis and Clark Trail
8
Keep slight right at fork onto US 395
3.8 mi·5 min·Lewis and Clark Trail
Toward US 395: Kennewick, Pendleton, Columbia Basin College, Tri Cities Airport
9
Continue on US 395
1.1 mi·2 min·North US 395
10
Continue on US 395
24 mi·26 min·Lewis and Clark Trail Highway
11
Take the exit onto US 395
0.2 mi·22 sec·US 395
Toward US 395 south, US 730: Umatilla, Hermiston, Irrigon
12
Keep slight left at fork onto US 395
171 ft·10 sec·US 395
Toward US 395 south, US 730: Umatilla, Hermiston, Irrigon
13
Turn left onto US 395; US 730
0.8 mi·57 sec·Columbia River Highway
14
Turn right onto US 395
3.8 mi·4 min·Umatilla-Stanfield Highway
15
Continue on US 395
0.5 mi·44 sec·North 1st Street
16
Turn left onto East Theater Lane
0.3 mi·40 sec·East Theater Lane
17
Turn right onto Northeast 4th Street
1.6 mi·2 min·Northeast 4th Street
18
Turn left onto US 395
3.2 mi·3 min·Umatilla-Stanfield Highway
19
Continue on US 395
2.0 mi·2 min·North Main Street
20
Continue on US 395
1.4 mi·1 min·Umatilla-Stanfield Highway
21
Take the exit onto US 395
0.5 mi·1 min·US 395
Toward US 395 North: Stanfield
22
Merge onto I 84; US 30; US 395
215 mi·3 hr 48 min·Old Oregon Trail Highway
Use the straight / slight right lanes.
23
Continue on I 84; US 20; US 26; US 30
0.7 mi·47 sec·Idaho Medal of Honor Highway
24
Continue on I 84; US 20; US 26; US 30
1.0 mi·1 min·Vietnam Veterans Memorial Highway
Use the straight / slight right lanes.
25
Take the exit onto US 20; US 26
0.3 mi·40 sec·Idaho Medal of Honor Highway
Exit 29Toward US 20, US 26 East
26
Turn left onto US 20; US 26
0.4 mi·55 sec·Franklin Road
27
Continue on US 20; US 26
7.0 mi·9 min·Idaho Medal of Honor Highway
28
Continue on US 20; US 26
2.1 mi·3 min·West Chinden Boulevard
29
Turn left onto ID 16
2.1 mi·2 min·Central Valley Expressway
30
Turn right onto ID 44
5.4 mi·7 min·West State Street
31
Turn left onto South Eagle Road
0.3 mi·1 min·South Eagle Road
32
Arrive at destination
North Eagle Road
Trip Plan
To make the most of this 8-hour drive, splitting it over two days is highly recommended. Aim to start your first day early to maximize daylight hours for navigating the local road sections. With two planned stops, consider breaking up your journey roughly in half, perhaps after completing the 215.2-mile stretch on Old Oregon Trail Highway. Keep an eye on your fuel levels, especially when off the Interstate, as services might be less frequent. A practical tip for this route: be extra mindful of speed limit changes when transitioning from highway driving to local roads, as the "turn-heavy" profile suggests frequent adjustments.
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 218.4 miles from Post Falls, ID, or about 4h 7m into the drive.
The longest continuous stretch on this route runs about 215.2 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 96 miles or 1h 47m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 218.4 miles or 4h 7m 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 218.4 miles or 4h 7m
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 6h 54m
Traffic, exits, and arrival timing usually matter more near Eagle, ID than in the middle of the route.
Before You Leave
+
Open the route before leaving Post Falls, 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 Post Falls, ID
Aim for roughly 218 miles and 4 hours of wheel time on this day.
Day 2
Finish the approach into Eagle, ID
Aim for roughly 218 miles and 4 hours of wheel time on this day.
Your first comfortable stop window is around 96 miles from Post Falls, 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 Old Oregon Trail Highway for about 215.2 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 218.4 mi from Post Falls, ID
· 4h 7m into the drive
Place data sourced from public business listings. Hours and availability may vary.
Fuel & Cost
Regular Gas
$69.23 one way
$138.47 round trip
$4.03/gal25.4 MPG avg153 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.22
$72.57
$145.14
premium
$4.53
$77.94
$155.87
diesel
$5.61
$96.46
$192.92
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$69
Hotel (1n)
$80–$140
Meals
$50–$100
Total
$199–$309
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 152.9 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $46 in charging
· 1 stop
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
131.1
1
$45.87
$20.97
Efficient EV
109.2
1
$38.23
$17.48
EV Truck/SUV
174.8
2
$61.17
$27.96
Gas CO2
153 kg
EV CO2
51 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
Post Falls, ID
Morning
in Post Falls on Friday
Local time
6:31 AM
PDT
Current temp
45°F
Unavailable
Live forecast
Destination
Eagle, ID
Morning
in Eagle on Friday
Local time
7:31 AM
MDT
Current temp
46°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.
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
1 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
8h 5m 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.
Frequently Asked Questions
The drive from Post Falls, ID to Eagle, ID covers 436.9 miles and takes about 8h 5m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are Old Oregon Trail Highway, Thomas S. Foley Memorial Highway, I 90. Expect a mix of highway and local road driving.
Consider an overnight stop or starting very early.
Yes. This route is usually more comfortable as a 2-day drive. A sensible stopping point is after roughly 218 miles on day one.
The midpoint is about 218.4 miles from Post Falls, ID. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $69.23 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 is a demanding drive. With 21 significant decision points across 436.9 miles, you will need to stay alert - especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
The main spots that need attention: at 83.3 miles (US 395 / Thomas S. Foley Memorial Highway): Highway fork - watch signs carefully. Multiple destination signs - pick the right one; at 157 miles (US 395): Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 159.4 miles (US 395 / Lewis and Clark Trail): Highway fork - watch signs carefully. Multiple destination signs - pick the right one.
Between Post Falls, ID and Eagle, ID, road signs point toward Ritzville, Pasco, Pendleton, Columbia Basin College, Tri Cities Airport and Hermiston - among others.
How this page is built
Compiled and maintained by the Trip.ovh planning team at COD Solutions Oy (Helsinki). Each route is built from authoritative open government and mapping datasets rather than crowdsourced reviews. Distances and geometry come from
OSRM
over
OpenStreetMap.
Fuel cost uses
EIA
weekly regional averages.
Pages are published only after passing our data-quality checks; our
methodology page
documents refresh cadence, editorial standards, and known limitations.
