It's less known outside of the region, but there are times when the Coast Starlight offers snow scenes and challenges comparable to the Rockies or the other Cascades crossings. Opened in 1927, the Cascades Line between Dunsmuir and Eugene through Klamath Falls and Oakridge bypasses the original...
BOLT (aka Greyhound) "indefinitely" ends Cascades service:
BoltBus, the Affordable Bus Service That Would Ferry Portlanders as Far North as Vancouver, B.C., Has Shut Down Indefinitely
BoltBus
The Greyhound booking website for July 5th shows that they have added a second GL trip to SEA<>PDX...