A few other secondary forest roads serve the Coco Valley, especially for forestry and recreational tourism activities.

The surface of the "Bras du Coco" is usually frozen from the beginning of December to the end of March, however the safe circulation on the ice is generally done from mid-December to mid-March.

The "Bras du Coco" rises at the mouth of Lac Croche (length: 1.9 km (1.2 mi); altitude: 357 m (1,171 ft)) which is located at the southwestern limit of the municipality Ferland-et-Boilleau.

This source is located at: The "Bras du Coco" flows over 11.8 km (7.3 mi) with a drop of 127 m (417 ft) especially in the forest zone, according to the following segments: The "Bras du Coco" pours into a bend on the south bank of the rivière à Mars.

This confluence is located at: From the confluence of the "Bras du Coco" with the rivière à Mars, the current follows the course of the rivière à Mars on 23.0 km (14.3 mi) generally towards the north, crosses the Baie des Ha!