I picked a ton of mushroom in my yard yesterday. Unfortunately they aren't anything you'd want to eat. Not poisonous, but not tasty according to the mushroom guy I took some samples to a couple of years ago.
These big guys grow near Douglas firs. The biggest one is about 5 inches across. All that moss - yeah, that's a NW lawn
They're very yellow underneath
A favorite of banana slugs
I picked a big bag about 2/3rds full of those plus a bunch of other varieties (also safe to eat, but not delicious) before mowing the lawn. It doesn't really work to mow them and you end up with a big pile of mush in the lawn.