The main neighboring
watersheds of the Ashberham River are: • north side:
Bécancour River,
Bécancour Lake; • east side:
rivière de l'Or; • south side:
Grand lac Saint François; • west side: Lake Noir,
Bisby River,
Bécancour River. The Ashberham River has its source on the southern flank of the Collines de Bécancour, that is to say to the southwest of the
Thetford Mines airport. From there, the river descends on first towards the southeast, then the south and the southwest, until it empties on the north shore of
Caribou Lake (length: ; altitude: 331) that the current crosses over towards the southwest. This lake is located to the south of Collines Rééd and Colline Crabtree, to the south-east of Mont Quarry and to the east of Colline Provençal. The
Thetford Mines mining sites are located on the northwest side of these mountains. The northern slope of the lake is mountainous. Its mouth flows to the southwest of the lake. From Caribou Lake, the Ashberham River flows first south, then southeast, to the mouth of Beebe Creek (from the north); and east, crossing the road bridge, to the west shore of
Petit lac Saint-François (Ashberham). This lake is completely surrounded by chalet. The current crosses the "Petit lac Saint-François" on towards the southwest to the mouth of the lake located to the south. Then, the river flows on south to its mouth. The mouth of the Ashberham river is located on the north shore of
Grand lac Saint François, at (on the water) northeast of the Jules-Allard dam which is erected at the mouth of
Grand lac Saint François and (on the water) southwest of the mouth of the
rivière de l'Or. == Toponymy ==