A few other secondary forest roads serve the Bras de l'Enfer valley, mainly for forestry and recreational tourism activities.

The surface of the Bras de l'Enfer is usually frozen from the beginning of December to the end of March, however the safe circulation on the ice is generally made from mid-December to mid-March.

The Bras de l'Enfer rises at the mouth of Lake Trema (length: 0.15 km (0.093 mi); altitude: 897 m (2,943 ft)).

This source is located at: From its source, the Bras de l'Enfer flows over 18.6 km (11.6 mi) with a drop of 457 m (1,499 ft) entirely in forest and mountainous zones, according to the following segments: The Bras de l'Enfer pours down on the east bank of the rivière à Mars.

This confluence is located at: From the confluence of the Bras de l'Enfer with the rivière à Mars, the current follows the course of the rivière à Mars on 55.3 km (34.4 mi) generally towards the north, crosses the Baie des Ha!