My favorites in the Pacific Northwest:
1. Chambers Bay, near Tacoma
2. Apple Tree, Yakima
3. Desert Canyon, near Wenatchee
4. MeadowWood or Qualchan, Spokane
5. Shuksan Golf Club, Bellingham
As you can see, I've spent most of my life in Washington, so I can't speak much about Oregon, Idaho, or Alaska. (Alaska has golf?)
Chambers Bay: you just HAVE to play it to believe it. Makes you think, every hole is distinctive, every shot is easy or hard, depending on your choice and your execution. Awesome, and deserving of a US Open. If they don't trick it up...
Apple Tree is just too fun to play, with strategy, beauty, and the great weather of the east side.
Desert Canyon is also on the east side, with beautiful views and challenging holes.
I like anything in the Spokane area just because of the setting. These two are my favorites, but Deer Park is another.
And Shuksan is close to my home, lots of rolling holes and challenging interest.
My also-rans: Avalon, Gallery, Gold Mountain, Dungeness, Highlander (Wenatchee), The Home Course, and a couple in the Tri-Cities area. I haven't played anything in the Seattle area since I left there thirty years ago; too expensive or crowded it seems, but there are some great tracks, especially Washington National and Trophy.
But I'm a fair-weather golfer, so I'm still waiting for the thermometer to show me something in the 50's or 60's.