I currently attend SLCC in Utah but I am from Boise.
After being here for a semester I can say I miss home. Boise is the coolest fucking place (I have never lived in Oregon or Washington so I can't speak for that). Bogus Basin is a awesome "small" mountain with a great community and its less than 30 minutes from Downtown. If you want some good snow you can go to brundage which is less than 2 hours away. If you want to go to a "real" park with big jumps and a pipe etc. you can go to sun valley which is really close. I may be biased because Idaho is home but I love it there.
I know people at Boise State and peoples opinions vary(some can't stand it and some love it).
It is really hard to go wrong with any of the states you mentioned from what i've heard so I'm just giving you my two cents.
Best of luck! I hope you find the right place. If you need any information on Boise or Salt lake just send me a message and help you with what I can!