I-90 Snoqualmie Pass

I‑90 over Snoqualmie Pass is the main road across Washington's Cascades — the route Seattle takes to Ellensburg, Spokane and everything east, carrying around 29,000 vehicles a day over the 3,022‑foot summit. That elevation is the lowest of the state's three year-round crossings, which is why Snoqualmie holds out longer than Stevens or White Pass in most storms — but the volume means a single spinout stacks miles of brake lights, and The Summit at Snoqualmie's four base areas (Alpental, Summit West, Summit Central and Summit East) sit directly at the pass, about 52 miles from downtown Seattle.

The cameras below run west to east in drive order: North Bend up the eastbound climb past Denny Creek to the summit, then Hyak and the avalanche-bridge section along Keechelus Lake — the camera there still carries the old snow shed's name, though the 1950 shed came down in 2014 and slides now pass under the freeway on bridges — and down past Easton to Cle Elum. Read the strip like the climb: rain at North Bend often means snow at the summit, and the difference decides whether you're driving or chaining.

Above the cameras sits a live banner reading WSDOT's official mountain pass report — the same feed behind the WSDOT app. Washington's restriction ladder runs "traction tires advised" to "traction tires required" (vehicles over 10,000 pounds must chain) to "chains required on all vehicles except AWD" and, in the worst conditions, chains on absolutely everything.