Spokane to Seattle is the corridor that defines the inland-to-tidewater half of Washington\'s freight economy. 280 miles via I-90 west: Spokane to Ritzville to Moses Lake, across the Columbia River at the Vantage Bridge (active WSDOT deck-replacement construction zone through 2028), through Ellensburg, up over Snoqualmie Pass (3,022 feet), down through North Bend, and into the Puget Sound metro. Roughly 5 to 5.5 hours running time for a solo driver under 11-hour HOS — a comfortable single overnight or team-driver day with substantial route-day capacity for onward dispatch into Kent Valley, Tacoma, or Boeing supplier locations.
The lane carries a mix of freight: refrigerated for Yakima Valley apple / cherry / hop and Columbia Basin produce inbound to Kent Valley DCs and Sea-Tac air cargo, dry van for Spokane and inland-origin CPG / retail distribution, flatbed for Inland Northwest lumber and project cargo bound for Puget Sound construction, drayage for NWSA Tacoma marine terminal hand-off feeding inland Kent Valley distribution, step-deck for Boeing supplier ecosystem inbound (Renton, Everett, Auburn, Frederickson), and power-only tractor dispatch against Amazon Relay and Walmart Drop Trailer pools at Kent Valley DCs.
Evergreen Shippers (FMCSA MC#896325) is the Spokane-anchored transportation broker for this lane. Spokane HQ on I-90 puts us on the inland origin side of every container, every produce load, every Boeing supplier shipment heading west to the Puget Sound. We dispatch this corridor with closer carrier and trailer pool oversight than out-of-state brokers reaching in — particularly during Snoqualmie Pass winter windows when carrier preparation discipline matters most.
Open Eastern Washington high-desert plateau. I-90 carries 4-lane divided interstate through wheat country and the Columbia Basin agricultural corridor. Moses Lake is the major waypoint with substantial industrial development, an inland port, and growing data-center cluster. Light traffic, generally good weather year-round, occasional wind events that affect high-profile vehicles.
The Columbia River crossing at Vantage. WSDOT\'s I-90 Vantage Bridge deck replacement ($79 million federally funded, started spring 2024, completion 2028): single lane each direction 24/7 with 9-foot lane width restriction during construction. All lanes temporarily reopen Memorial Day, July 4, and Labor Day weekends. Eastbound Friday and westbound Sunday peak delays are worst. Wide loads above 9 feet need alternate routing.
Climb from the Columbia River out of the Kittitas Valley. Ellensburg sits at the I-90 / I-82 junction — the southbound I-82 split connects to Yakima Valley and Tri-Cities. Anderson Hay (hay export), Al Dahra ACX (compress plant), and the Central Washington University presence anchor the city. Moderate winter weather; chain law begins approaching Snoqualmie westbound.
The mountain segment. WSDOT chain law (WAC 204-24-050) requires 2+ chains for CMVs over 10,000 lb GVWR between MP 32 (North Bend) and MP 101 (Ellensburg) effective Nov 1 through Apr 1. Chain-up locations at Issaquah eastbound, North Bend eastbound and westbound, Hyak both directions. Occasional 24-48 hour avalanche-control closures in heavy-snow winters. The single most dispatch-discipline-intensive segment of the lane.
Descent into the Puget Sound metro. I-90 terminates at I-5 in Seattle; southbound I-5 from there serves Tacoma and Kent Valley distribution. Heavy commute-period traffic eastbound out of Seattle (5-7 PM weekdays) and westbound into Seattle (6-9 AM weekdays). Appointment-sensitive deliveries (Kent Valley DCs, Boeing supplier ecosystem) require timing dispatch around the rush.
US-2 Stevens Pass (4,061 ft, similar weather profile, sometimes opens when Snoqualmie closes); US-12 White Pass (4,500 ft, useful for Tri-Cities / Yakima origins routing west); I-84 Columbia Gorge to I-5 north (adds 100+ miles but stays at low elevation through the Gorge). We monitor all WSDOT and ODOT pass conditions in real time, route around closures rather than wait, and pre-position Eastern WA carriers when Snoqualmie closure risk forecasts.
Yakima Valley apple / cherry / hop and Columbia Basin produce inbound to Kent Valley DCs and Sea-Tac air cargo. Aug-Oct apple harvest is the peak season; June-July cherry compression layers on top. Standard reefer at 32-35°F for produce, 28-32°F for hop pellets, with pre-cool discipline at origin packing houses.
Spokane-origin and inland-origin CPG distribution to Kent Valley DCs, Boeing field locations, and the broader Puget Sound retail network. 53-foot dry van standard. Power-only dispatch against Amazon Relay and Walmart Drop Trailer pools at the Kent Valley terminus.
Inland Northwest lumber (Idaho Forest Group network, Spokane-area mills) bound for Puget Sound construction and distribution. Project cargo for Boeing supplier ecosystem (Renton, Everett, Auburn, Frederickson) and Seattle metro construction. 48 and 53-foot flatbed plus Conestoga standard.
Boeing supplier oversize and the project cargo flow that exceeds flatbed dimensions. Multi-axle RGN with jeep and booster for the heaviest moves; step-deck for shorter oversize. WSDOT eSNOOPI Pro permit coordination. Vantage Bridge 9-foot width restriction during construction is the recurring routing constraint.
NWSA Tacoma marine terminal drayage feeds inland Kent Valley distribution and onward inland east via I-90. We coordinate the gate pull through vetted Tacoma drayage operators and own the inland line haul east. Reefer plug capacity, chassis assignment, and appointment compliance are the recurring operational layer.
Amazon Relay and Walmart Drop Trailer power-only dispatch against shipper trailer pools at Kent Valley DCs (Amazon BFI4 Kent, Amazon Sumner, Amazon DuPont). We dispatch Spokane-side tractors against Seattle-side trailer pools for drop-and-hook efficiency. See our Power-Only Freight Broker page for full equipment match.
Chain law November through April plus occasional 24-48 hour avalanche-control closures. We dispatch chain-equipped carriers, monitor WSDOT hourly, and divert via US-2 / US-12 / I-84 when Snoqualmie closes.
WSDOT deck-replacement project running single lane each direction with 9-foot lane width. Wide loads need alternate routing or weekend-opening timing. We route accordingly.
Late arrivals at Amazon, Costco, REI, and other Kent Valley DCs reschedule with per-diem on containers and shipper relationship cost. We sequence dispatch against the appointment window with Snoqualmie margin built in during winter.
Heavy commute traffic eastbound out of Seattle 5-7 PM weekdays, westbound into Seattle 6-9 AM weekdays. We time appointment-sensitive deliveries around the rush rather than getting caught at I-5 / I-90 / I-405 interchanges during peak.
The lane runs heavy westbound (Eastern WA origin to Puget Sound) but the eastbound backhaul economics depend on Seattle / Tacoma origin shipments to Spokane and Eastern WA. We pair westbound loaded with eastbound retail / CPG distribution rather than running deadhead.
Oversize moves require WSDOT permits via eSNOOPI Pro plus any local jurisdictions (Kittitas County for Vantage Bridge area, Snohomish / King County in the Puget Sound metro). We coordinate the permit workflow as a single dispatch task.
Call (509) 321-4380 — origin dock, destination dock, equipment, pickup window. We dispatch I-90 every day.