The adjacent hydrographic slopes of the Jean-Pierre River are:

• north side: Gouin Reservoir, Kikendatch Bay, Au Vison River, Brochu Lake, Wapous River;
• east side: Kikendatch Bay, Saint-Maurice River, Cypress River;
• south side: Norah Creek, Najoua Creek, Saint-Maurice River, Huot River, Manouane River (La Tuque);
• west side: Leblanc River, Five Mile Lake, Kettle Bay, Chapman Lake (Gouin Reservoir), Gouin Reservoir.

The Jean-Pierre River originates at the mouth of Machinila Lake (length: 0.5 kilometres (0.31 mi); altitude: 500 metres (1,600 ft)). The mouth of this lake head is located at:

• 4.2 kilometres (2.6 mi) south-east of the mouth of the Jean-Pierre River (confluence with Jean-Pierre Bay of Gouin Reservoir);
• 22.0 kilometres (13.7 mi) south of the dam at the mouth of the Gouin Reservoir (confluence with the Saint-Maurice River);
• 40.9 kilometres (25.4 mi) north-east of the village center of Wemotaci, Quebec which is located along the Saint-Maurice River;
• 132 kilometres (82 mi) north-west of downtown La Tuque.^[2]

From the mouth of the head lake, the course of the Jean-Pierre River flows over 23.4 kilometres (14.5 mi) according to the following segments:

• 5.1 kilometres (3.2 mi) north-east, then north across Lac Jean-Pierre (length: 2.3 kilometres (1.4 mi); altitude: 474 metres (1,555 ft)) on its full length, to its mouth. Note: Lake Jean-Pierre straddles the townships of Dansereau and Bureau;
• 3.3 kilometres (2.1 mi) north across Lake Sylvain (length: 1.0 kilometre (0.62 mi); altitude: 474 metres (1,555 ft)) on its full length, then the Minister's Lake (length: 3.9 kilometres (2.4 mi); altitude: 465 metres (1,526 ft)) on 1.8 kilometres (1.1 mi), to its mouth;
• 4.0 kilometres (2.5 mi) northwesterly to the mouth of Lake Peter (length: 2.9 kilometres (1.8 mi); altitude: 425 metres (1,394 ft)) that the current crosses over a hundred meters;
• 3.2 kilometres (2.0 mi) north-east between the mountains, to the outlet of South Lake (coming from the East);
• 7.4 kilometres (4.6 mi) southwesterly, passing between two mountains, cutting a forest road, then crossing a lake (length: 3.5 kilometres (2.2 mi); altitude: 413 metres (1,355 ft)) formed by a widening of the river, to the eastern limit of the township of Leblanc;
• 0.4 kilometres (0.25 mi) northwesterly in the Township of Leblanc to its mouth.^[3]

The confluence of the "Jean-Pierre River" with the Gouin Reservoir is located at:

• 11.7 kilometres (7.3 mi) south-west of Gouin Dam;
• 66.4 kilometres (41.3 mi) south-east of the village center of Obedjiwan, Quebec;
• 56.0 kilometres (34.8 mi) northwest of the village center of Wemotaci, Quebec;
• 144.7 kilometres (89.9 mi) north-west of downtown La Tuque;
• 251 kilometres (156 mi) northwest of the mouth of the Saint-Maurice River (confluence with the St. Lawrence River at Trois-Rivières).

The Jean-Pierre River flows on the eastern shore of Jean-Pierre Bay (length: 7.9 kilometres (4.9 mi) advancing south), straddling the townships of Aubin and Leblanc. From this mouth, the current flows northward on 7.4 kilometres (4.6 mi) through Jean-Pierre Bay; then, the current flows eastward on 12.0 kilometres (7.5 mi) across the Kikendatch Bay to the Gouin Dam. From there, the current flows along the Saint-Maurice River to Trois-Rivières, where it flows on the North Shore of the St. Lawrence River.

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