Mushroom Season in Elmhurst

I went out for an early morning walk/run with Maisy.  You can really tell the season's are starting to change - mostly because of the later arrival of the sunrise.  While out on the walk, on the lot of the house that I think is getting torn down, I spotted this HUGE mushroom.  It is easily 12" in diameter.  I actually have never witnessed one this big.  Ever.  Our lot is lit up with lots of little 'shrooms, so the conditions must be right for them right now.