Widdebierg is a hill in the commune of Betzdorf, in eastern Luxembourg. At 386 metres, it is one of the highest points in the canton of Grevenmacher. It is in the centre of a nature reserve (named Widdebierg after the hill), which lies between the towns of Flaxweiler, Mensdorf, and Roodt-sur-Syre.
49°39′43.20″N 6°18′54″E / 49.6620000°N 6.31500°E