Since Seattle launched its first Gay Pride Festival in 1974, it's become the largest gay festival in the Northwest. As they make their way to the Freedom Rally, Northwest gays, lesbians, bisexuals and transgenders march side by side in the annual Pride parade in celebration of their solidarity.
If you are interested in more details about the parade, here is the official site of the Seattle's Pride festival.

Anyway, enough comments for now... here are the images.