Trail Maps The Trail Book is currently out of print and in the process of being updated.  Please leave your email with us (link below) and we will email you when it is completed.  Expected completion is spring of 2008!!  Here is a sample map of Gambo Gunpowder Mills taken from the Gorham Trails map Book.  To have your name added to our list email us here.  We appreciate your interest. Gorham Trails 4A Aspen Lane Gorham, Maine 04038