Cascade Pass part 3. Cascade Pass is like a vast funnel where moist air from the Pacific gets squeezed and pushed up into this gap between the mountains. It's right in the clouds and most of the year it's socked in like this. It's also quite windy, which you can tell by the way the way the trees lean. photo 2: Cascade mountain ash tree (Sorbus scopulina) in the fog. It's a close relative of the Rowan tree native to Europe and Asia. 3/7 #hiking #PNW #mountain #getoutside #nativeplants