You should have made a field trip out to Galena, IL; they actually have skiing on those hills. I was amazed the first time that I went there...I though we had driven into a completely different state.
Back to business:
Per the 2008 NEC (210.52E), it's installed no more than 6'-6" above grade, so you can certainly stand on the dirt and use the receptacle.
Granted there would be a bush poking you in the butt, but the receptacle meets the requirements IMHO.
