There are loads of morris dancers up there, but I'm out of touch with the west coast morris community so I couldn't say what the organized teams might be these days.

On a hunch, I went to www.seattlemorris.org -- which turns out to be a real address of a team that no longer dances out. If you go to that site, you'll find an e-mail addy of someone who might be able to answer your question more completely.