Allagash is great if you like the Belgian style. Shipyard amkes some good beers in different genres.
The answer is easy though: Deschuttes! They kick ass all over the place. Especially if you like stouts. They are one of the breweries my brother has me send stuff East for him. Abyss, Black Butte, Hop in the Dark, Hop Henge.... All among my favorites. I hear they have great beer bars around there too. While you're out there make sure you try stuff at the bars you don't get East. Look for Russian River, Ale Smith, Port, Lost Abbey, Kern River....
I can give you specific West Coast recommendations if you tell me what your favorites are and what styles you like.