Washington State Route 906

On Thursday, August 7, 2025, we drove Washington State Route 906, and this time it counted.

State route No. 906:

A state highway to be known as state route number 906 is established as follows:

Beginning at a junction with state route number 90 at the West Summit interchange of Snoqualmie Pass, thence along the alignment of the state route number 90 as it existed on May 11, 1967, in a southeasterly direction to a junction with state route number 90 at the Hyak interchange.

Highway 906 begins up here in the clouds, at this junction with I-90. There are no signs for 906 in this vicinity. Highway 906 runs mostly north-south, but it's signed east-west since it's closely parallel to the freeway.


Highway 906 is the route of the original highway over Snoqualmie Pass. When the freeway was built, the state probably tried to turn the old route over to the counties since it was redundant, but I guess the counties wouldn't take it. Too much maintenance. We start down from the pass. Here's a photo around the halfway point.


We pass ski areas with empty parking lots, like the old Ski Acres where I learned to ski--at night. We cruise down the hill to Hyak and reach I-90 yet again. Just like that, Highway 906 is done.

The old highway is now a frontage road in the mountains. It can be a pleasant drive if the freeway is clogged (or if you just prefer two-lane roads).