Crossing Washington from the Pacific Coast to Spokane Valley is a significant trek, covering 397.4 miles across the state. Expect roughly 7 hours and 53 minutes of drive time, making this a long but manageable single-day haul if you start early. You will primarily utilize I-5, State Route 18, and I-90 to navigate the distance. Budget approximately $83 for fuel to complete the journey. While it is possible to finish this in one day, the length makes it a demanding drive, so plan your schedule carefully to avoid fatigue. Whether you are traveling for business or a cross-state visit, this route provides a straightforward connection between the coast and the inland region.
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
198.7 miles from Westport, WA
A natural place for your longest stop of the day
, about 4h 15m into the drive
.
Main Roads
Road
Distance
Duration
I 90
263.1 mi
4h 46m
I 5
37 mi
46m
State Route 18
27.3 mi
34m
WA 8
21.1 mi
26m
Olympic Highway
19.1 mi
25m
State Route 105
15.8 mi
27m
US 101
6 mi
8m
North Montesano Street
2.2 mi
5m
Longest stretch:
I 90
— 263.1 mi, about 4h 46m
Turn-by-Turn Driving Directions
Step-by-step road directions between Westport, WA and Spokane Valley, WA.
1
Start on North Montesano Street
2.2 mi·5 min·North Montesano Street
2
Turn left onto WA 105
0.8 mi·1 min·State Route 105
3
Continue on WA 105
15 mi·26 min·State Route 105
4
Continue on WA 105
0.5 mi·52 sec·Westport Road
5
Continue on WA 105
1.6 mi·3 min·South Boone Street
6
Merge onto US 101
0.5 mi·1 min·US 101
7
Turn right onto US 12
0.2 mi·34 sec·East Heron Street
Toward US 12 East, Olympia
8
Continue on US 12
474 ft·13 sec·Hornsby Way
9
Turn right onto US 12
1.4 mi·2 min·East Wishkah Street
10
Continue on US 12
19 mi·25 min·Olympic Highway
11
Continue on WA 8
21 mi·26 min·WA 8
12
Merge onto US 101
5.4 mi·7 min·US 101
13
Keep slight left at fork
0.5 mi·52 sec
14
Merge onto I 5
29 mi·36 min·I 5
Use the straight / slight right lanes.
15
Keep slight right at fork onto I 5
8.2 mi·10 min·I 5
Use the slight right lane.
16
Take the exit
0.5 mi·1 min
Exit 142AToward WA 18 East: Auburn, Muckleshoot ReservationUse the straight / slight right lanes.
17
Merge onto WA 18
27 mi·34 min·State Route 18
Use the straight / slight right lanes.
18
Continue on WA 18
0.1 mi·8 sec·Snoqualmie Parkway
19
Take the exit
0.6 mi·1 min
Toward I 90 East: Spokane
20
Merge onto I 90
252 mi·4 hr 32 min·I 90
Use the straight / slight right lanes.
21
Merge onto I 90; US 2; US 395
11 mi·14 min·I 90; US 2; US 395
22
Take the exit
0.4 mi·51 sec
Toward WA 27
23
Turn left onto WA 27
148 ft·11 sec·North Pines Road
Use the straight / left lanes.
24
Arrive at destination
WA 27
Trip Plan
To make the most of your 397.4-mile trek, plan for at least two dedicated stops to break up the 7-hour and 53-minute duration. Since the majority of your time is spent on I-90, keep an eye on traffic patterns near major hubs to avoid unnecessary delays during peak hours. Leaving early in the morning is your best strategy to ensure you reach Spokane Valley before the end of the day without feeling rushed. Given the $83 fuel estimate, check your vehicle’s range before embarking on that 263.1-mile stretch on I-90 to avoid potential fuel anxiety. Flexibility is key here; use your two planned stops as opportunities to stretch and refuel so you arrive feeling refreshed rather than exhausted.
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 198.7 miles from Westport, WA, or about 4h 15m into the drive.
The longest continuous stretch on this route runs about 263.1 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 87 miles or 2h 5m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 198.7 miles or 4h 15m 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 45m
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 Westport, 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.
+
Pick one backup stop option before the midpoint in case traffic changes your pacing.
Day 1
Settle into the route from Westport, WA
This is one driving day of about 397.4 miles and 7h 53m.
Your first comfortable stop window is around 87 miles from Westport, WA.
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 I 90 for about 263.1 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 14
5 decision points cluster between mile 20.7 and 106 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
6
20.7 mi into trip|~38m in|US 12 / East Heron Street
Turn right onto US 12 / East Heron Street toward US 12 East, Olympia
Multiple destination signs - pick the right one
Toward US 12 East, Olympia
5
68.5 mi into trip|~1h 42m in|I 5
Merge onto I 5
Merge point - match speed before joining. Lane positioning matters here
Use the straight / slight right lanes.
6
97.3 mi into trip|~2h 18m in|I 5
Keep slight right at fork onto I 5
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight right lane.
8
105.5 mi into trip|~2h 28m in
Take the exit toward WA 18 East: Auburn, Muckleshoot Reservation
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.
Exit 142A
Toward WA 18 East: Auburn, Muckleshoot Reservat...
5
106 mi into trip|~2h 29m in|WA 18 / State Route 18
Merge onto WA 18 / State Route 18
Merge point - match speed before joining. Lane positioning matters here
Use the straight / slight right lanes.
Fuel & Cost
Regular Gas
$83.17 one way
$166.34 round trip
$5.32/gal25.4 MPG avg139 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$5.58
$87.22
$174.45
premium
$5.77
$90.24
$180.49
diesel
$5.61
$87.74
$175.48
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$83
Meals
$25–$50
Total
$108–$133
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 139 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $42 in charging
· 1 stop
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
119.2
1
$41.73
$19.08
Efficient EV
99.4
1
$34.77
$15.90
EV Truck/SUV
159
1
$55.64
$25.43
Gas CO2
139 kg
EV CO2
46 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 16, 2026
Origin
Westport, WA
Evening
in Westport on Saturday
Local time
6:12 PM
PDT
Current temp
49°F
Unavailable
Live forecast
Destination
Spokane Valley, WA
Evening
in Spokane Valley on Saturday
Local time
6:12 PM
PDT
Current temp
50°F
Chance Light Snow
W 8 mph45% 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
Same local time
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
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
7h 53m 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.
National Parks Near This Route
Worth a detour if your schedule allows.
Klondike Gold Rush - Seattle Unit National Historical Park
National Historical Park
Seattle flourished during and after the Klondike Gold Rush. Merchants supplied people from around the world passing through this port city on their way to a remarkable adventure in the Yukon Territory...
19 mi from route
~48 min detour
Free
near mile 123.3
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This trip is a highway-focused endeavor, with 93% of the journey spent on major high-speed roads. You will settle into a rhythm quickly, as the route features a substantial 263.1-mile uninterrupted stretch along I-90. The driving experience is consistent rather than technical, prioritizing efficiency over local backroads. Be prepared for the transition from coastal transit to the long-distance interstate haul that defines the bulk of your time behind the wheel. It is a practical, utilitarian drive that favors speed and directness to get you to your destination efficiently.
93% highway — fuel and pacing are the main things to plan.
24 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 263.1 mi on I 90.
How Hard Is This Drive?
9/10
This is a straightforward highway drive that stays mostly on I 90 and I 5. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 20.7 miles in near US 12 / East Heron Street.
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 14 significant decision points across 397.4 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 20.7 miles (US 12 / East Heron Street): Multiple destination signs - pick the right one; at 68.5 miles (I 5): Merge point - match speed before joining. Lane positioning matters here; at 97.3 miles (I 5): Highway fork - watch signs carefully. Lane positioning matters here.
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Westport, WA and Spokane Valley, WA, road signs point toward Olympia and Muckleshoot Reservation.
Olympia
20.7 mi in|~38m|via US 12
Muckleshoot Reservation
105.5 mi in|~2h 28m
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 7h 53m. Total distance: 397.4 miles.
Family Friendly
Moderate complexity with 2 natural rest stops along the way.
Solo Traveler
7h 53m drive, plan rest stops for pacing.
Frequently Asked Questions
The longest stretch is about 263.1 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.
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 Valley, 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 2 meaningful breaks. Dedicated rest areas are limited, so plan gas or food stops as your bathroom breaks.
The main spots that need attention: at 20.7 miles (US 12 / East Heron Street): Multiple destination signs - pick the right one; at 68.5 miles (I 5): Merge point - match speed before joining. Lane positioning matters here; at 97.3 miles (I 5): Highway fork - watch signs carefully. Lane positioning matters here.
Yes — Klondike Gold Rush - Seattle Unit National Historical Park. See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 7.9 hours each way, a round trip means 15.8 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Spokane Valley, WA before the return drive.
