The Clerve is a river flowing through Luxembourg, joining the Wiltz at Kautenbach. It flows through both the towns of Troisvierges and the town of Clervaux. Upstream of Clervaux, it is known as the Woltz.
Country: Luxembourg
Mouth: Wiltz
Length: 48 km (30 mi)
Basin size: 222 km² (86 sq mi)
Progression: Wiltz→ Sauer→ Moselle→ Rhine→ North Sea