Kane County Fair ends with a smashing success Genna Kowalski of West Chicago, right, and Dria Kuntz of Mendota collide during a women's round of the demolition derby at the Kane County Fair in St. Charles. The derby was among the highlights of the fair's final day. Ryan Rayburn for the Daily Herald Driver Genna Kowalski, left, of West Chicago gets some last-minute words of encouragement Sunday from team sponsor Joe Jackson Sr. before she competes in a women's round of the demolition derby on the final day of the Kane County Fair in St. Charles. Ryan Rayburn for the Daily Herald