No, it's always held at the Capitol - Olympia. I'm not living there, but used to. Generally speaking they would get several thousand....which the media would always scale back. There are always freaks who counterprotest life...usually no more than 20. They are typically in early 20's, have lots of metal in their face, dress in black, and sport unnatural colors of hair. They are a fraction of the attendees, but get most of the press.
Oh, you mean the typical Seattlite.
I attended last Wednesday's March for Life in Olympia. About 1000-1500 people. It was really wonderful! It is the largest annual event held on the capitol steps.