The river Valserine is a tributary of the Rhône that flows for 47.6 kilometres (29.6 mi) from the Col de la Faucille in the Jura Mountains to its confluence with the Rhône at Bellegarde-sur-Valserine.
The Valserine Valley has great charm; it includes the Pont des Pierres that spans the river between Montanges and Mulaz (in the commune of Confort), as well as the Pertes de la Valserine just north of Bellegarde-sur-Valserine, a canyon in which during the dry season the Valserine runs underground.
As the river flows through the village of Mijoux, it marks the border between Ain (a department in the Auvergne-Rhône-Alpes region) and Jura (in Bourgogne-Franche-Comté).
The Valserine River is known for being a great spot for fly fishing, especially for trout and grayling.
