Driving
Port Townsend to Kennewick
Updated: 28 May 2026
The journey from Port Townsend to Kennewick spans approximately 330 miles across the state of Washington. You will begin by taking the Washington State Ferry from Port Townsend to Coupeville, then driving across the Cascades via I-90. This route takes you through the scenic Snoqualmie Pass before descending into the arid Columbia Basin. Expect a total travel time of roughly 6 hours depending on ferry schedules and traffic. The transition from coastal rainforest to high desert landscape is the defining feature of this trip.
Total Distance: 530 km driving distance; 310 km straight-line air distance.
Fastest Way
Driving is the only practical method, taking 6.5 hours including the ferry crossing.
Cheapest Way
Driving your own vehicle is the most cost-effective method, costing approximately 70 dollars in fuel and ferry fees.
Compare Port Townsend to Kennewick Routes
Driving
Direct
Duration
6 hours 30 mins
Avg Price
60-80 USD
Operator
Personal Vehicle
Route
WA-20 to Coupeville Ferry, then WA-20 to I-5, I-405, and I-90 East.
Check the WSDOT ferry schedule online before departing to avoid long wait times at the terminal.
Travel Tips
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Ferry ReservationsAlways book your ferry reservation in advance to guarantee a spot on your preferred sailing.
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Mountain WeatherCheck pass reports on the WSDOT website during winter months for snow and ice conditions.
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Fuel UpFill your tank in the Puget Sound area before heading over the Cascades to avoid higher prices in remote mountain towns.
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Traffic TimingAvoid driving through the Seattle-Bellevue corridor during weekday rush hours to save significant time.
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HydrationKeep extra water in your car, as the eastern Washington climate is significantly drier than the coast.
Safety Tips
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Mountain DrivingUse low gears when descending Snoqualmie Pass to prevent brake overheating.
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Wildlife AwarenessWatch for deer and elk crossing the highway, especially during dawn and dusk hours.
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Emergency KitCarry a basic emergency kit including blankets, water, and a flashlight for mountain travel.
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Cell ServiceExpect intermittent cell service in the mountain passes; download offline maps before leaving.
People Also Ask
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Is there a train to Kennewick?Amtrak provides service to Pasco, which is adjacent to Kennewick, via the Empire Builder line.
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How long is the ferry ride?The ferry from Port Townsend to Coupeville takes approximately 35 minutes.
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Are there tolls on this route?Yes, the ferry crossing and potentially the SR 520 bridge if you choose that route involve tolls.
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What is the best route?Taking I-90 East is the most direct and reliable route across the state.
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Is Kennewick safe?Kennewick is generally considered a safe residential and commercial hub in the Tri-Cities area.
Quick Info
- From Port Townsend, Washington, United States
- To Kennewick, Washington, United States
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Modes
Best Time to Travel
June through September for clear mountain passes and dry weather in the Tri-Cities.
Things to Do in Kennewick
1
Fort Worden State Park
Explore historic military bunkers and coastal trails in Port Townsend. It offers panoramic views of the Strait of Juan de Fuca.
2
Snoqualmie Pass
Stop at the summit for alpine hiking or skiing. The area features dramatic mountain scenery and accessible trailheads.
3
Columbia Park
Located in Kennewick, this park stretches along the Columbia River. It is perfect for walking, cycling, and riverfront picnics.
4
Tri-Cities Wine Region
Visit local vineyards near Kennewick. The region is famous for its high-quality Cabernet Sauvignon and Merlot.
Tags
Port Townsend to Kennewick drive
driving from Olympic Peninsula to Tri-Cities
I-90 route Washington
best way to Kennewick from Port Townsend
Washington state road trip guide
traveling across Washington state
Port Townsend travel guide
Kennewick transport options
