Séran river, a first category river for fario trout fishing, is a river that rises in the Valromey, upstream from Grand Abergement, at an altitude of more than 1,000 m above sea level.
At the level of Artemare, the Groin, the Yon River and various streams flow into the Séran.
Downstream, the Séran, fed by the Rhone water table, flows through the Lavours marsh. Trout are still fished here, although populations are clearly decreasing, unlike grayling fishing which is now prohibited. This part is managed by the AAPPMA of Belley and Culoz-Artemare.
The fishing lots of the public domain are located on the communes of Artemare, Ceyzerieu, Béon, Flaxieu and Cressin-Rochefort.