Mattawa, WA to Spokane Valley, WA is 167.5 miles and takes about 3h 9m via I 90 and WA 26, with a fuel budget near $35 and enough daylight to finish in a day. This drive stays within Washington State, taking you across the Pacific Coast region. It's a straightforward, highway-focused trip that's perfect for a single-day journey. You'll spend most of your time on major roadways, making it a practical option when you need to get from point A to point B efficiently.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Break Rhythm
1 planned break
A short stop every 2 to 3 hours is enough for this drive.
Midpoint
83.7 miles from Mattawa, WA
A natural place for your longest stop of the day
, about 1h 36m into the drive
.
Main Roads
Road
Distance
Duration
I 90
150.9 mi
2h 43m
State Route 243
14.3 mi
21m
WA 26
0.9 mi
1m
Government Road
0.3 mi
<1m
Road 24 Southwest
0.3 mi
<1m
North Pines Road
<0.1 mi
<1m
Longest stretch:
I 90
— 150.9 mi, about 2h 43m
Turn-by-Turn Driving Directions
Step-by-step road directions between Mattawa, WA and Spokane Valley, WA.
1
Start on Government Road
0.3 mi·35 sec·Government Road
2
Continue on Road 24 Southwest
0.3 mi·35 sec·Road 24 Southwest
3
Enter roundabout onto WA 243
10 ft·0 sec·State Route 243
Toward Vantage
4
Continue on WA 243
14 mi·21 min·State Route 243
Toward Vantage
5
At end of road, turn left onto WA 26
0.9 mi·1 min·WA 26
6
Take the ramp
0.3 mi·43 sec
Toward I 90 East: Spokane
7
Merge onto I 90
140 mi·2 hr 29 min·I 90
8
Merge onto I 90; US 2; US 395
11 mi·14 min·I 90; US 2; US 395
9
Take the exit
0.4 mi·51 sec
Toward WA 27
10
Turn left onto WA 27
148 ft·11 sec·North Pines Road
Use the straight / left lanes.
11
Arrive at destination
WA 27
Trip Plan
Given the relatively short duration of just over 3 hours, you have plenty of flexibility with your departure time. Leaving in the morning allows you to arrive well before evening, avoiding late-night driving. With only one recommended stop, you can easily manage breaks as needed, perhaps for a quick fuel refill or stretch. The longest uninterrupted stretch is over 150 miles on I 90, so plan for that significant segment if you prefer to break up driving time. Ensure your vehicle is fueled up before departing Mattawa, as opportunities may be less frequent on certain parts of the route.
Morning Departure
An early start around 7-8 AM gets you there with plenty of daylight left.
Evening Departure
A late afternoon start means arriving after dark. Morning is better.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 83.7 miles from Mattawa, WA, or about 1h 36m into the drive.
The longest continuous stretch on this route runs about 150.9 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 37 miles or 46m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 83.7 miles or 1h 36m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 2h 34m
Traffic, exits, and arrival timing usually matter more near Spokane Valley, WA than in the middle of the route.
Before You Leave
+
Open the route before leaving Mattawa, 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 Mattawa, WA
This is one driving day of about 167.5 miles and 3h 9m.
Your first comfortable stop window is around 37 miles from Mattawa, 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 I 90 for about 150.9 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 7
5 decision points cluster between mile 0.7 and 167.4 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
6
0.7 mi into trip|~1m in|WA 243 / State Route 243
Enter roundabout onto WA 243 / State Route 243 toward Vantage
Roundabout - know your exit number before entering
Toward Vantage
4
15 mi into trip|~22m in|WA 26
At end of road, turn left onto WA 26
Navigation decision point
3
15.8 mi into trip|~23m in
Take the ramp toward I 90 East: Spokane
Navigation decision point
Toward I 90 East: Spokane
4
167 mi into trip|~3h 8m in
Take the exit toward WA 27
Exit ramp - move to the correct lane early
Toward WA 27
4
167.4 mi into trip|~3h 9m in|WA 27 / North Pines Road
Turn left onto WA 27 / North Pines Road
Lane positioning matters here
Use the straight / left lanes.
Fuel & Cost
Regular Gas
$35.06 one way
$70.11 round trip
$5.32/gal25.4 MPG avg59 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$5.58
$36.76
$73.53
premium
$5.77
$38.04
$76.07
diesel
$5.61
$36.98
$73.96
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$35
Meals
$25–$50
Total
$60–$85
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 58.6 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $18 in charging
· 0 stops
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
50.3
0
$17.59
$8.04
Efficient EV
41.9
0
$14.66
$6.70
EV Truck/SUV
67
0
$23.45
$10.72
Gas CO2
59 kg
EV CO2
20 kg (66% less)
This trip is well within single-charge range for most EVs. No charging stops needed if you start fully charged.
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
Mattawa, WA
Morning
in Mattawa on Sunday
Local time
11:06 AM
PDT
Current temp
50°F
Unavailable
Live forecast
Destination
Spokane Valley, WA
Morning
in Spokane Valley on Sunday
Local time
11:06 AM
PDT
Current temp
45°F
Unavailable
Live forecast
67°F
Odessa, WA
84 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
5 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
3h 9m on the road
Use the two city cards together: check the sky where you start, then compare it with the local time and temperature at arrival.
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 is predominantly a highway drive, with 99% of the journey on major roads like I 90 and WA 26. You'll experience long stretches of consistent speed, including a significant 150.9-mile segment on I 90. The character is largely that of efficient travel, where the focus is on covering distance rather than navigating complex local roads. Expect a smooth, high-speed experience for the majority of your drive, with minimal deviations from the main interstate.
99% highway — fuel and pacing are the main things to plan.
11 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 150.9 mi on I 90.
How Hard Is This Drive?
2/10
This is a straightforward highway drive that stays mostly on I 90 and State Route 243. Navigation is very simple - set it and forget it for most of the drive. The trickiest moment comes around 0.7 miles in near WA 243 / State Route 243.
Driving Effort2/10
Very easy - short and simple to drive
Balances navigation complexity with total wheel time.
The drive from Mattawa, WA to Spokane Valley, WA is easy. At 3h 9m with 99% highway, most drivers will find it relaxed and low-stress.
Where does it get tricky?
The main spots that need attention: at 0.7 miles (WA 243 / State Route 243): Roundabout - know your exit number before entering; at 15 miles (WA 26): Navigation decision point; at 15.8 miles: Navigation decision point.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 3h 9m. Total distance: 167.5 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
The longest stretch is about 150.9 miles on I 90. 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.
Yes, with realistic expectations. Build in a stop roughly every 2 hours, have snacks and activities ready, and check the Nearby Places tabs for kid-friendly stops along the way.
The main spots that need attention: at 0.7 miles (WA 243 / State Route 243): Roundabout - know your exit number before entering; at 15 miles (WA 26): Navigation decision point; at 15.8 miles: Navigation decision point.
Possible but tiring. At 3.2 hours each way, an in-and-out day trip would put you behind the wheel for 6.3 hours — manageable with a long break at Spokane Valley, WA, but most travelers stay overnight.
