This is a really old thread but I decided to post anyway.
Those are the classical storybook picture of Amanita muscaria (fly agaric). A. muscaria is usually red capped in the Old World and on the West side of the Coast Range in Oregon and Washington. On the Willamette Valley side, they are usually orange.
Those are huge. The mycelium must have been growing for years before it decided to cast those fruiting bodies.
