Mushrooms!

We live in a rather arid climate here on the hills above Billings, Montana.
I mean, we have scorpions and lizards (neither of which I ever saw growing up in the lush Gallatin Valley near Bozeman, Montana).
We did have a big rain a few weeks ago, though and apparently, some mushroom spores had a chance to take hold on the edge of our driveway.

What a surprise to find such large healthy mushroom specimens in our environment.