I'm taking the Amtrak Coast Starlight to Seattle starting today! I've been wanting to travel this whole route for about 15 years so I'm glad to finally decide to do it. To date I've done between SB and San Jose several times and between Eugene and Seattle once. Will post some pics as I go. Starting out at Santa Barbara train station and should arrive tomorrow evening.
Some pics from close to SB
Later in the day we went inland which held its own delights
From sunrise today in NorCal/southern Oregon there were some excellent vistas. I even saw two bald eagles in the wetlands near Klamath Falls (not pictured)
Unfortunately we entered a wildfire smoke area around lunch and the ventilation had to be shut off
And I made it to Seattle!
@jbalkind Would you recommend it? Also, did you get a room or just a regular seat?

@kai definitely - my favourite part remains the coast of California followed now by the area around Mt Shasta and southern Oregon. There was a bit less to see further north, mainly just TREES

I did have a room. It's much more cost effective to share but I booked last minute so it was pricey. The room is definitely better than the roomette with the en suite shower/toilet/sink and for people who don't like to be rocked side to side, you lie perpendicular to the direction of travel which is nice