Cross-bedding in what I've been told is lacustrine sediment. The clastic material is clearly ash-derived. There is a lot of evidence of soft-sediment deformation in this road cut; the photo above is a good example.
Photo unprocessed. Lens cap, ~52 mm, in lower right middle. August 18, 2011. FlashEarth location (cross-hairs on pull-out).
A word of caution: Route 97 is a busy, fast and dangerous highway. The pull-out is plenty big enough to get well off the pavement- please do. Also, visibility is decent but not great- that is, both pedestrians and traffic can see each other pretty well. But I WOULD NOT recommend trying to stop here from the south-bound lane, coming downhill. (one downhill lane, two uphill lanes). If you choose to cross the road, be very attentive. There's a pair of stops we made in this area; here we crossed. At the second, we just felt it was unsafe. There's plenty to see from the other side of the road. If it looks dangerous, don't even try.
Followup: Messing around in Paint.net, decided to post a processed version to bring out the details more clearly.