The adjacent hydrographic slopes of the Wapous River are:

• north side: Oskatcickic Creek, Townsend Creek, Normandin River, Normandin Lake (Normandin River), Buade Lake (Normandin River);
• east side: Berlinguet Lake, Berlinguet Creek, Little Creek, Du Loup River (Ashuapmushuan Lake), Trenche River South;
• south side: Atimokateiw River, Leblanc River (Gouin Reservoir), Gouin Reservoir (Aux Brochets Bay), Jean-Pierre River (Gouin Reservoir), Déziel Lake;
• west side: Gouin Reservoir, Magnan Lake, McSweeney Lake.

The Wapous River originates at the mouth of an unidentified lake (length: 0.4 kilometres (0.25 mi) altitude: 526 metres (1,726 ft)). The mouth of this head lake is located at:

• 20.9 kilometres (13.0 mi) north-east of the mouth of the Wapous River (confluence with the Gouin Reservoir);
• 46.1 kilometres (28.6 mi) northwest of the dam at the mouth of the Gouin Reservoir (confluence with the Saint-Maurice River);
• 51.8 kilometres (32.2 mi) north-east of the village center of Obedjiwan, Quebec (located on a peninsula on the north shore of Gouin Reservoir);
• 181.5 kilometres (112.8 mi) north-west of downtown La Tuque.

From the mouth of the head lake, the course of the Wapous River flows over 31.6 kilometres (19.6 mi) according to the following segments:

• 2.2 kilometres (1.4 mi) south through Trap Lake (elevation: 513 metres (1,683 ft)) to its mouth;
• 5.9 kilometres (3.7 mi) to the south in particular crossing the Cold Lake (length: 1.0 kilometre (0.62 mi); altitude: 490 metres (1,610 ft)) on its full length and the “Lake De La Loupe” (length: 1.4 kilometres (0.87 mi); altitude: 477 metres (1,565 ft)) on the South-East, to its mouth. The “Lake De La Loupe” straddles the townships of Lindsay and Berlinguet;
• 2.4 kilometres (1.5 mi) south-east in Berlinguet Township, crossing Lake First (length: 1.4 kilometres (0.87 mi); altitude: 467 metres (1,532 ft)) on 1.4 kilometres (0.87 mi) to its mouth;
• 1.3 kilometres (0.81 mi) towards the Ust, to the eastern limit of the township of Linsay;
• 12.0 kilometres (7.5 mi) southwesterly to the northern limit of the township of Déziel;
• 7.8 kilometres (4.8 mi) southerly in the County of Déziel forming a large S at the end of the segment to its mouth.

The confluence of the "Wapous River" with the Normandin River is located at:

• 5.0 kilometres (3.1 mi) north of the mouth of Lake Déziel;
• 34.9 kilometres (21.7 mi) northwest of the Gouin Reservoir dam (head of the Saint-Maurice River);
• 87.2 kilometres (54.2 mi) northwest of the village center of Wemotaci;
• 174.2 kilometres (108.2 mi) north-west of downtown La Tuque;
• 283.7 kilometres (176.3 mi) northwest of the mouth of the Saint-Maurice River (confluence with the St. Lawrence River at Trois-Rivières).

The Wapous River flows on the eastern shore of Déziel Lake, which is an extension to the east of the Gouin Reservoir. From the confluence of the Wapous River with Lake Déziel, the current flows generally southward Gouin Reservoir: 5.4 kilometres (3.4 mi) while crossing the Déziel Lake mouth; 38.8 kilometres (24.1 mi) to the south via the bay Kikendatch until Gouin Dam in Levasseur Township.

• Saint-Maurice River
• Gouin Reservoir, a body of water
• La Tuque, Quebec, a city
• Haute-Mauricie, a territory corresponding to the town of La Tuque
• List of rivers of Quebec