I rode my dirt bike down to the bottom of this quarry back in the day when it was a ski area. Around 1976. I never went skiing there because the 2 winters before they closed were too warm and no snow for skiing.
Here is more info on Thunder Mountain on this website:
Thunder Mountain in Chicago
Posted by: Scottnchgo (---.coxfiber.net)
Date: January 21, 2009 09:35AM
Edited 1 time(s). Last edit at 03/13/2012 06:07PM by rjmachon.