The Mars River is located between Bagotville and Port-Alfred.
It runs from the mouth of Ha!
Ha!
Bay to the edges of the Laurentian Wildlife Reserve.
It is officially recognized as a salmon river by the federal government and is protected until it reaches the Bec-Scie Outdoors Centre (French: Centre plein-air Bec-Scie).
It has ninety-two pools and about twenty potential spawning grounds.

Until it reaches the Laurentian Park, the river is maintained by the Mars River Sport Fishing Association (French: Association des pêcheurs sportifs de la Rivière-à-Mars Inc (APSRM)).
It was founded in 1983 to protect, restore, and promote the Mars River's salmon population.

From 1894 to 1935, the Price Brothers Company ran a private club near the river.
The construction of the Murailles Dam in 1930 and river driving until 1953 prevented the proliferation of salmon.
The river was reseeded in 1976.
It was closed to sport fishing in 1985, but was reopened again in 1992.
A fishway was constructed after the 1996 deluge that destroyed the original one built in 1986.

Other than salmon, there are seven other fish species found in the river: brook trout, longnose dace, Northern sucker, white sucker, American eel, threespine stickleback, and northern pearl dace.
The Mars River is located between Bagotville and Port-Alfred. It runs from the mouth of Ha! Ha! Bay to the edges of the Laurentian Wildlife Reserve. It is officially recognized as a salmon river by the federal government and is protected until it reaches the Bec-Scie Outdoors Centre (French: Centre plein-air Bec-Scie). It has ninety-two pools and about twenty potential spawning grounds.
Until it reaches the Laurentian Park, the river is maintained by the Mars River Sport Fishing Association (French: Association des pêcheurs sportifs de la Rivière-à-Mars Inc (APSRM)). It was founded in 1983 to protect, restore, and promote the Mars River's salmon population.
From 1894 to 1935, the Price Brothers Company ran a private club near the river. The construction of the Murailles Dam in 1930 and river driving until 1953 prevented the proliferation of salmon. The river was reseeded in 1976. It was closed to sport fishing in 1985, but was reopened again in 1992. A fishway was constructed after the 1996 deluge that destroyed the original one built in 1986.
Other than salmon, there are seven other fish species found in the river: brook trout, longnose dace, Northern sucker, white sucker, American eel, threespine stickleback, and northern pearl dace.
La Baie