The Yères is the quietest of the Seine-Maritime chalk streams, running for sixty-odd kilometres from its rise near Fresnoy-Folny down to the sea at Criel-sur-Mer. It's pure chalk — clear, cold, stable, slightly less buffered than the bigger Normandy rivers but still running within five or six degrees of its annual mean — and it holds wild brown trout throughout, with grayling in the better pools below Sept-Meules. Not a river of monsters. The average fish is modest and the technique is classic: small flies, fine tippets, long leaders, patience. Mayfly through the third week of May, sedges through June, and blue-winged olives into September. AAPPMA access for most of the length. A good choice when the Arques or the Bresle are too crowded and you want a quiet day on water that rewards knowing how to read it.
- Chalk