Mill Plain, WA to Spokane, WA is 347.4 miles and takes about 6h 44m via US 395, with a fuel budget near $73 and enough daylight to finish in a day. This drive takes you across Washington State, moving from the Pacific Coast region inland towards Spokane. It's a mixed drive that's manageable in a single day, offering a straightforward path through the state. Consider this trip if you're looking for an efficient way to get from one side of Washington to the other, with a clear route and a predictable travel time.
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
173.7 miles from Mill Plain, WA
A natural place for your longest stop of the day
, about 3h 28m into the drive
.
Main Roads
Road
Distance
Duration
US 395
131.2 mi
2h 21m
Columbia River Highway
122.2 mi
2h 13m
McNary Highway
29.9 mi
33m
Evergreen Highway
19.9 mi
27m
Old Oregon Trail Highway
11.4 mi
12m
Southeast Lewis and Clark Highway
7.6 mi
10m
Lewis and Clark Trail
4.9 mi
6m
Lewis and Clark Highway
4.9 mi
6m
Longest stretch:
US 395
— 131.2 mi, about 2h 21m
Turn-by-Turn Driving Directions
Step-by-step road directions between Mill Plain, WA and Spokane, WA.
1
Start on this road
0.1 mi·35 sec·this road
2
Turn left onto Northeast 29th Street
201 ft·14 sec·Northeast 29th Street
3
Turn left onto Northeast 172nd Avenue
1.9 mi·3 min·Northeast 172nd Avenue
4
Turn right onto Southeast Mill Plain Boulevard
0.4 mi·53 sec·Southeast Mill Plain Boulevard
5
Turn left onto Southeast 164th Avenue
1.7 mi·3 min·Southeast 164th Avenue
Use the left lane.
6
Take the ramp
0.5 mi·56 sec
Toward WA 14 East: Camas
7
Merge onto WA 14
3.1 mi·3 min·Southeast Lewis and Clark Highway
Use the straight / slight right lanes.
8
Continue on WA 14
3.9 mi·5 min·Lewis and Clark Highway
Use the straight / slight right lanes.
9
Enter roundabout onto WA 14
85 ft·1 sec·Lewis and Clark Highway
10
Continue on WA 14
0.9 mi·1 min·Lewis and Clark Highway
11
Enter roundabout onto WA 14
102 ft·1 sec·Southeast Lewis and Clark Highway
12
Continue on WA 14
4.5 mi·6 min·Southeast Lewis and Clark Highway
13
Continue on WA 14
20 mi·27 min·Evergreen Highway
Use the straight lane.
14
Turn right onto Bridge of the Gods
0.6 mi·3 min·Bridge of the Gods
15
Turn right onto US 30
1.3 mi·2 min·Wa-Na-Pa Street
Use the right lane.
16
Continue on US 30
0.2 mi·20 sec·Frontage Road
Toward I 84 East
17
Take the ramp onto US 30
0.3 mi·19 sec·US 30
Toward I 84 East
18
Merge onto I 84; US 30
122 mi·2 hr 13 min·Columbia River Highway
19
Continue on I 84; US 30
11 mi·12 min·Old Oregon Trail Highway
20
Take the exit
0.8 mi·1 min
Toward I 82 West: Hermiston, Umatilla
21
Continue on I 82
30 mi·33 min·McNary Highway
22
Keep slight right at fork onto US 395
3.3 mi·4 min·Lewis and Clark Trail Highway
Toward US 395 north to I‑182: Kennewick, Pasco, Spokane
23
Continue on US 395
1.1 mi·2 min·South US 395
24
Continue on US 395
4.9 mi·6 min·Lewis and Clark Trail
Use the straight / slight right lanes.
25
Take the exit onto US 395
0.2 mi·21 sec·US 395
Toward US 395 north, SR 397 south (Oregon Street): Spokane, FinleyUse the straight / slight right lanes.
26
Keep slight left at fork onto US 395
0.3 mi·34 sec·US 395
Toward US 395
27
Keep slight right at fork onto US 395
131 mi·2 hr 20 min·US 395
Toward US 395 North: SpokaneUse the slight right lane.
28
Merge onto I 90; US 2; US 395
1.8 mi·2 min·I 90; US 2; US 395
29
Take the exit
0.2 mi·31 sec
Toward Maple Street, Lincoln Street, Walnut Street
30
Continue on West 5th Avenue
382 ft·12 sec·West 5th Avenue
31
Turn straight onto West Freeway Avenue
0.2 mi·32 sec·West Freeway Avenue
32
Continue on West 4th Avenue
0.2 mi·31 sec·West 4th Avenue
33
Continue on West 4th Avenue
167 ft·4 sec·West 4th Avenue
34
Continue on South Lincoln Street
0.4 mi·1 min·South Lincoln Street
Use the straight / left lanes.
35
Turn left onto West Main Avenue
0.2 mi·34 sec·West Main Avenue
36
Turn right
26 ft·8 sec
37
Turn left onto South Gorge Trail
157 ft·17 sec·South Gorge Trail
38
Arrive at destination
South Gorge Trail
Trip Plan
Starting your drive from Mill Plain, WA, towards Spokane, WA, is best done early in the day to maximize daylight hours, especially since the total travel time is around 6 hours and 44 minutes. You have one suggested stop, which is a good opportunity to break up the 347.4-mile journey. Keep an eye on your fuel, as the estimated cost is $73, and plan your refueling stops accordingly. Given the longest stretch is over 131 miles, ensure you have ample fuel before embarking on those longer segments, particularly on US 395.
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 1 meaningful break for fuel, food, and rest.
The halfway point lands around 173.7 miles from Mill Plain, WA, or about 3h 28m into the drive.
The longest continuous stretch on this route runs about 131.2 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 41m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 173.7 miles or 3h 28m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 5h 36m
Traffic, exits, and arrival timing usually matter more near Spokane, WA than in the middle of the route.
Before You Leave
+
Open the route before leaving Mill Plain, WA 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 Mill Plain, WA
This is one driving day of about 347.4 miles and 6h 44m.
Your first comfortable stop window is around 76 miles from Mill Plain, WA.
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 US 395 for about 131.2 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 22
5 decision points cluster between mile 4.1 and 213.5 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
5
4.1 mi into trip|~9m in
Take the ramp toward WA 14 East: Camas
Navigation decision point
Toward WA 14 East: Camas
6
203.7 mi into trip|~4h 1m in|US 395 / Lewis and Clark Trail Highway
Keep slight right at fork onto US 395 / Lewis and Clark Trail Highway toward US 395 north to I‑182: Kennewick, Pasco, Spokane
Highway fork - watch signs carefully. Multiple destination signs - pick the right one
Toward US 395 north to I‑182: Kennewick, Pasco,...
7
213 mi into trip|~4h 15m in|US 395
Take the exit onto US 395 toward US 395 north, SR 397 south (Oregon Street): Spokane, Finley
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Toward US 395 north, SR 397 south (Oregon Stree...
6
213.2 mi into trip|~4h 16m in|US 395
Keep slight left at fork onto US 395 toward US 395
Highway fork - watch signs carefully
Toward US 395
7
213.5 mi into trip|~4h 16m in|US 395
Keep slight right at fork onto US 395 toward US 395 North: Spokane
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight right lane.
Toward US 395 North: Spokane
Fuel & Cost
Regular Gas
$72.71 one way
$145.42 round trip
$5.32/gal25.4 MPG avg122 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$5.58
$76.25
$152.50
premium
$5.77
$78.89
$157.78
diesel
$5.61
$76.70
$153.40
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: 121.5 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $36 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
104.2
1
$36.48
$16.68
Efficient EV
86.9
0
$30.40
$13.90
EV Truck/SUV
139
1
$48.64
$22.23
Gas CO2
122 kg
EV CO2
41 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 Apr 15, 2026
Origin
Mill Plain, WA
Evening
in Mill Plain on Saturday
Local time
6:06 PM
PDT
Current temp
69°F
Unavailable
Live forecast
Destination
Spokane, WA
Evening
in Spokane on Saturday
Local time
6:06 PM
PDT
Current temp
45°F
Unavailable
Live forecast
72°F
Warm Springs, OR
174 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.
Time zone
Same local time
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
24 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
6h 44m 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 offers a mixed driving experience, with 39% of the journey on highways. You'll spend a significant portion of your time on US 395, which can feel like a straightforward highway for long stretches. The longest uninterrupted segment you'll encounter is 131.2 miles on US 395, so be prepared for extended periods of driving without frequent turns. While much of the drive is on main roads like US 395 and the Columbia River Highway, the overall profile suggests a journey that balances faster travel with potentially more local road sections.
39% highway, the rest on surface roads — varied driving throughout.
38 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 131.2 mi on US 395.
How Hard Is This Drive?
9/10
This route mixes highway mileage with some local-road sections near the start or finish. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 4.1 miles in.
Driving Effort9/10
High effort - long or complex enough to need steady focus all day
Balances navigation complexity with total wheel time.
This is a demanding drive. With 22 significant decision points across 347.4 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 4.1 miles: Navigation decision point; at 203.7 miles (US 395 / Lewis and Clark Trail Highway): Highway fork - watch signs carefully. Multiple destination signs - pick the right one; at 213 miles (US 395): Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Mill Plain, WA and Spokane, WA, road signs point toward Umatilla, Pasco and Finley.
Umatilla
173 mi in|~3h 27m
Pasco
203.7 mi in|~4h 1m|via US 395
Finley
213 mi in|~4h 15m|via US 395
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 6h 44m. Total distance: 347.4 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
6h 44m drive, plan rest stops for pacing.
Scenic Drive
Mixed highway & surface route profile.
Frequently Asked Questions
The longest stretch is about 131.2 miles on US 395. 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.
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 Spokane, WA 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 1 meaningful breaks. Dedicated rest areas are limited, so plan gas or food stops as your bathroom breaks.
The main spots that need attention: at 4.1 miles: Navigation decision point; at 203.7 miles (US 395 / Lewis and Clark Trail Highway): Highway fork - watch signs carefully. Multiple destination signs - pick the right one; at 213 miles (US 395): Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Not recommended in a single day. At 6.7 hours each way, a round trip means 13.5 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Spokane, WA before the return drive.
