1. The Popelogan River is a tributary of the Upsalquitch River on the eastern shore of Canada's New Brunswick, mainly passing through the Addington Parish in Restigouche County.
2. The Popelogan river travels through a valley in the steep terrain that gets deeper as it moves south. The Gordon Brook and the "Lake Popelogan Branch," which supplies Popelogan Lake, are its principal tributaries.
3. Popelogan Depot provides access to the upper half of the river via a woodland road.