| Clarence | |
|---|---|
 The Clarence in Lapugnoy | |
   | |
| Location | |
| Country | France |
| Physical characteristics | |
| Source | |
| • location | Picardie |
| Mouth | |
• location | Lys |
• coordinates | 50°38′16″N 2°38′45″E / 50.63778°N 2.64583°E |
| Length | 33 km (21 mi) |
| Basin features | |
| Progression | Lys→ Scheldt→ North Sea |
The Clarence is a river in northern France whose 33-kilometre (21 mi) course crosses the department of Pas-de-Calais.[1]
Its source is near the village of Sains-lès-Pernes. It flows through the communes of Sachin, Pernes, Calonne-Ricouart, Calonne-sur-la-Lys and Gonnehem, finally joining the Lys near Merville.
It has two tributaries, the Nave and the Grand Nocq.