This hydrographic slope is covered by several marsh areas. The surface of the river is usually frozen from early November to mid-May, however, safe ice movement is generally from mid-November to the end of April.
Geography
The main hydrographic slopes near the Martigny River are:
The Martigny River derives its source from "Lac aux Épices" (length: 3.9 kilometres (2.4mi), altitude: 241 metres (791ft)), located in the township of Martigny, in the municipality of Eeyou Istchee James Bay (municipality).
The mouth of "Lac aux Épices" is located at:
20.7 kilometres (12.9mi) Northwest of Martigny River mouth (confluence with Turgeon River);
103.6 kilometres (64.4mi) Southeast of the mouth of Harricana River;
23.3 kilometres (14.5mi) Northwest of the mouth of the Turgeon River;
23.0 kilometres (14.3mi) East of the Ontario border.
From the source, the Martigny River flows over 30.2 kilometres (18.8mi) according to the following segments:
4.3 kilometres (2.7mi) Southeast, to the outlet (coming from the south) of a group of lakes, notably Lemoyne, Laforge and Bouchard;
6.0 kilometres (3.7mi) Southeasterly to the west shore of Lac Martigny;
4.6 kilometres (2.9mi) Southeast across Lake Martigny (length: 5.7 kilometres (3.5mi); altitude: 242 metres (794ft)), up to mouth;
8.4 kilometres (5.2mi) Southeast across Finger Lake (length: 2.5 kilometres (1.6mi); altitude: 242 metres (794ft)), up to its mouth;
6.9 kilometres (4.3mi) Southeasterly to mouth
The Martigny River flows on the north shore of the Turgeon River, to:
6.0 kilometres (3.7mi) Southwest of the mouth of the Turgeon River;
South of the mouth of the Harricana River
36.2 kilometres (22.5mi) east of the Ontario border;
102.3 kilometres (63.6mi) west of downtown Matagami.
Toponymy
The term "Martigny" is a surname of French origin.
