I've been away from that part of the world for years, but when I was there, The Portland Photographer's Forum was THE photography group in that part of the world. To give you an idea of the type of group it was, Brooks Jensen was the newsletter editor.

A year or so ago, I saw that they had a web site, but I have not been able to google it successfully. Might want to hit some of the photo stores and galleries to see what's happening now.