Post Falls, ID to Wilder, ID is 415.6 miles and takes about 7h 40m via Old Oregon Trail Highway and I 90, with a fuel budget near $68 and enough daylight to finish in a day. This drive stays within Idaho, connecting two points in the Mountain West region. Expect a mix of highway and surface roads, making it a generally relaxed trip. With just two recommended stops and a longest stretch of 191.3 miles on surface roads, it's a manageable drive for a single day.
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
207.8 miles from Post Falls, ID
A natural place for your longest stop of the day
, about 3h 55m into the drive
.
Main Roads
Road
Distance
Duration
Old Oregon Trail Highway
191.3 mi
3h 25m
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
US 95
21.8 mi
24m
Umatilla-Stanfield Highway
8.4 mi
9m
Lewis and Clark Trail
5.7 mi
7m
Longest stretch:
Old Oregon Trail Highway
— 191.3 mi, about 3h 25m
Traffic on I-84
Hour-of-day weekday pattern from 33 FHWA count stations on your route.
Peak
2 PM
~526 veh/hr typical
· worst 741
Quietest
2 AM
~63 veh/hr
Peak-to-quiet ratio
8.3×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 52 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 Post Falls, ID and Wilder, 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
191 mi·3 hr 25 min·Old Oregon Trail Highway
Use the straight / slight right lanes.
23
Take the exit
0.2 mi·29 sec
Toward US 95: Payette, Parma
24
Turn right onto US 95
15 mi·17 min·US 95
25
Turn left onto US 95
6.5 mi·7 min·US 95
Use the left lane.
26
Arrive at destination
US 95
Trip Plan
Given the 7h 40m estimated drive time, leaving Post Falls in the morning is advisable to maximize daylight. Plan for your two stops to break up the 415.6-mile journey, especially since nearly 200 miles are on surface roads. Keep an eye on your fuel gauge; while the estimated cost is $68, surface road driving can sometimes be less predictable for fuel availability. The relatively short duration means you have flexibility, but it's still a good idea to have a general idea of where you'll take your breaks to avoid feeling rushed.
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 207.8 miles from Post Falls, ID, or about 3h 55m into the drive.
The longest continuous stretch on this route runs about 191.3 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 91 miles or 1h 41m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 207.8 miles or 3h 55m 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 34m
Traffic, exits, and arrival timing usually matter more near Wilder, 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.
Day 1
Settle into the route from Post Falls, ID
This is one driving day of about 415.6 miles and 7h 40m.
Your first comfortable stop window is around 91 miles from Post Falls, 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 Old Oregon Trail Highway for about 191.3 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 19
5 decision points cluster between mile 83.3 and 409.1 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
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
409.1 mi into trip|~7h 33m in|US 95
Turn left onto US 95
Lane positioning matters here
Use the left lane.
Fuel & Cost
Regular Gas
$73.06 one way
$146.11 round trip
$4.47/gal25.4 MPG avg145 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.67
$76.40
$152.79
premium
$4.99
$81.65
$163.29
diesel
$5.35
$87.54
$175.08
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$73
Meals
$25–$50
Total
$98–$123
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 145.4 kg one way.
Prices: EIA weekly data, 2026-06-01.
Driving Electric?
About $44 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
124.7
1
$43.64
$19.95
Efficient EV
103.9
1
$36.37
$16.62
EV Truck/SUV
166.2
2
$58.18
$26.60
Gas CO2
145 kg
EV CO2
49 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 Jun 1, 2026
Origin
Post Falls, ID
Afternoon
in Post Falls on Wednesday
Local time
12:11 PM
PDT
Current temp
49°F
Slight Chance Rain Showers
E 2 mph21% chanceLive forecast
Destination
Wilder, ID
Afternoon
in Wilder on Wednesday
Local time
1:11 PM
MDT
Current temp
49°F
Mostly Clear
NW 7 mph0% chanceLive 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 later
The destination clock does not match departure time, so double-check hotel check-in windows and late arrival plans.
Temperature spread
Very similar conditions
Both ends of the route are sitting at about the same temperature right now.
Road read
7h 40m 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.
More Details
What kind of drive is this?
This route features a highway share of 26%, meaning you'll spend most of your time on surface roads. The longest uninterrupted stretch is 191.3 miles on Old Oregon Trail Highway, which will likely feel like rural cruising. You'll transition from highway driving to these surface roads, so be prepared for varying speed limits and potentially more intersections as you move away from I 90.
Only 26% highway — the rest is turn-by-turn surface driving.
26 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 191.3 mi on Old Oregon Trail Highway.
How Hard Is This Drive?
7/10
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 19 significant decision points across 415.6 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.
Elevation Profile
Hilly terrain with moderate elevation changes
3,999 ft558 ft
Total Climb
4,304 ft
Total Descent
4,053 ft
Highest Point
3,999 ft
~326.6 mi in
Elevation Range
3,441 ft
Notable High Points
3,999 ft at ~326.6 miles+684 ft prominence
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 Wilder, ID, road signs point toward Ritzville, Pasco, Pendleton, Columbia Basin College, Tri Cities Airport and Hermiston - among others.
Doable as a same-day drive at 7h 40m. Total distance: 415.6 miles.
Family Friendly
Moderate complexity with 2 natural rest stops along the way.
Solo Traveler
7h 40m drive, plan rest stops for pacing.
Scenic Drive
Mostly surface roads route profile.
Frequently Asked Questions
The longest stretch is about 191.3 miles on Old Oregon Trail Highway. The full list of main roads is in the Roads section above.
Yes — we found about 32 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 route has a higher-than-average number of complex decision points, which get harder in the dark. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Wilder, 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 32 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 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.
Not recommended in a single day. At 7.7 hours each way, a round trip means 15.4 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Wilder, ID before the return drive.
