From the Marathon Archives:

This day in 1997... 

I completed my 14th marathon on this day in 1997.  It was the Grupa Dupa held at the Talcott Mountain State Park, home of the Heublein Tower. 

I believe Tony W and Janice K were the organizers of this "Fat Ass 50" type event.  It consisted of loops up and around the tower, but I do not recall how many.  It was 50k, and I recorded a time of 5:11:13.