Évançon

The Évançon is the stream which flows through the val d'Ayas and flows into the Doire baltée. Its name in Franco-Provençal might mean "Grand River" or "River from the Mountaintops" . In archival documents it is often referred to as l'eau blanche .

The stream has its origin in the Great Glacier of Verra at the top of the val d'Ayas. After coursing right through the valley, the Évançon flows into the Dora Baltea in Verrès, near the bridge of Fleuran. It flows through: Ayas, Brusson, Challand-Saint-Anselme and Challand-Saint-Victor. Near Targnod in the commune of Challand-Saint-Victor, the stream flows through the Gorge de Brisecou . Its base can be reached by a short walk from the road to Isollaz and a good observation spot can be reached by car on the road which leads to Verrès Castle.

Wikipedia