October 15 works best for me. (I get back from a week in Belize late at night on October 7, and October 22 is the Buff Betty adventure race, which I think I'm going to do with my neighbors.) I don't know much about the towpath so I don't have any preference as to which part of it we ride, but I know there's a nice parking lot off Riley's Lock, near Seneca Creek State Park I think. This should be fun!