I-90: Seattle → Spokane
Two hundred ninety-eight miles across the Cascade crest and the Columbia Plateau. Three years ago this was a planning headache. Today it is becoming routine.
By the numbers.
This corridor needs a plan in winter.
Between November and April, treat Snoqualmie Pass as a separate range calculation, not just another stretch of highway. A 280-mile rated EV with cabin heat running and a cold-soaked battery routinely loses 30-40% of its range climbing from Issaquah to the summit. The pass also closes for avalanche control with little warning. Plan to arrive at your next charge with 25% remaining, not 10%. The Easton, Cle Elum, and Ellensburg stops exist for exactly this reason. Use them.
Every stop, start to finish.
Plotted west to east. Scroll the route — each station lights up as you reach it.
The drive, in detail.
The I-90 corridor across Washington was, for a long time, the practical limit of what you could call a casual EV road trip. The drive is 298 miles end to end inside the state, and for years there was a real stretch between Issaquah and Spokane where your options got thin. The Vantage Bridge stop was a single Tesla supercharger and a hopeful prayer. Cle Elum had a slow Level 2 if you were patient. Moses Lake had nothing that would meaningfully refill a battery in under an hour.
That picture has changed in the last twenty-four months, and it is about to change further. Federal NEVI funding awarded in early 2026 added eight new fast-charging sites along this corridor, most of them on a Q3 2026 to Q1 2027 timeline. Tesla expanded its Magic Dock program. Electric Era stood up its first Washington locations at North Bend and Issaquah. Energy Northwest, the state’s public power generator, took a NEVI grant at Moses Lake. The corridor is becoming what it should have been all along.
This guide walks the route from west to east, mile by mile. Each milepost listing shows the chargers actually present, the elevation, the pass status if applicable, and our field notes on what to expect when you pull in. If you are driving east in winter, read the cold-weather callout below before you start.
One more thing before you set your buffers. If a stop on this corridor has ever taken twice as long as the app predicted, that has five specific and predictable causes — cold packs, shared power cabinets, the taper above 80% charge, and the gap between rated and delivered speed. We break down each one in Why Your EV Charging Stop Took Twice as Long as the App Promised.
Quick answers for this drive: what a road trip’s worth of fast charging costs, what to do when a charging stop is broken on arrival, whether you need a Supercharger adapter, whether Tesla or Electrify America is cheaper, and whether the NEVI program is still active.
Driving this corridor between November and April? The winter version of this route — cold-weather range loss, charger derating, and single-stall risk on the passes — is covered in Winter Mountain-Pass Charging: I-70, I-90, and I-84 in Snow.
Carrying the wrong adapter is a common cause of a stalled stop on this corridor. Our NACS vs. CCS vs. J1772 compatibility guide covers exactly which adapter your vehicle needs at any station type.