Ce parcours exigeant de 140 km et 6100 mètres de dénivelé positif relie les principales portions des Sentiers de l'Estrie, du village frontalier de Glen Sutton jusqu'au vieux pont de fer de Richmond. Il permet de grimper de nombreux sommets des Cantons-de-l'Est (Sutton, Écho, Singer, Orford, pic de l'Ours, Chauve, Trois Lacs).

Named after James Duncan for all his work in the area with the Lakehead Conservation Authority securing land and creating nature reserves. This route is a point to point from either the parking lot at Little Trout Bay Conservation Area to the parking lot at Memory Road (South Trailhead). Both parking lots have clear signs indicating the beginning/end of the trail. The trail itself is also very well marked and easy to follow. This FKT route includes the Spur Trail to the top of Mount Mollie (elevation 403 metres).  If doing the out & back you only have to do Mt Mollie once.