The lower part of the Roche Plate river valley is mainly served by the rang Saguenay road which first goes up to the north and branches off to the west to serve the north shore of the Bras du Nord including the hamlet Pine Lake.

[1] The surface of the Roche Plate River (except the rapids) is generally frozen from the beginning of December to the end of March, but the safe circulation on the ice is generally made from the end of December to the beginning of March.

The water level of the river varies with the seasons and the precipitation; the spring flood occurs in March or April.

The main hydrographic slopes neighboring the Roche Plate river are: The Roche Plate river takes its source from a small unidentified forest lake (length: 0.23 kilometres (0.14 mi); altitude: 647 metres (2,123 ft)).

The Roche Plate river flows on 9.7 kilometres (6.0 mi) to the southwest relatively straight in the municipality of Saint-Raymond, with a drop of 457 metres (1,499 ft).