The aircraft is the default (with Working Title help) Cessna Citation Longitude. My go to aeroplane for going any distance. I use the Black Square King Air for shorter runs. It's very good for a default aeroplane. The missus and I rent a house south of Portland in a town called Newberg so we see Mt Hood often when the weather is clear. Nice part of the world.
Great shots, lovely light for sure. Be keen to see some IRL shots of Portland next time you fly out? Went there on a conference for work many moons ago but didn't get to see much of the airport etc.