The Leucopaxillius Gigantea or giant funnel mushroom of the Pacific Northwest is quite found growing in large fairy rings or arcs in woodland clearings. It can be found in the Pacific Northwest and all of Vancouver Island. I have always called them fairy ring mushrooms because they so often form them.
The caps are whitish at first, but by maturity have darkened somewhat, becoming light gray and then a tan color. The mushrooms can grow caps that are up to 45cm across, but the bigger they, the more fragile they become.
Although they say they are edible, l have heard reports of stomach upsets and diarrhea after consumption. This mushroom has a hight attraction to a type of fruit fly and can be quite maggoty, my suggestion is to not eat them but just enjoy the fairy rings when you see them