Norwescon is the Pacific Northwest’s Premiere Science Fiction and Fantasy Convention and one of the largest regional Science Fiction and Fantasy conventions in the United States. While maintaining a primarily literary focus, Norwescon is large enough to provide a venue for many of the other aspects of Science Fiction and Fantasy and the interests of its fans such as anime, costuming, art, gaming, and much, much more.
Please see the official website for all additional details:
Note: I will not be attending this year -- I'm simply listing it for anybody who might be interested. I've gone for a day in the past and had a good time.