The Geul is a river in Belgium and in the Netherlands, where it is a right-bank tributary to the river Meuse.
The source of the Geul is at about 300 metres (980 ft) above sea level in northeastern Belgium near the German border, south of the German town of Aachen. From there, after flowing some 20 kilometres (12 mi) in a northwestern direction, it leaves Belgium and enters the Netherlands at Cottessen in the Vaals municipality. After a further 38 kilometres (24 mi) in a west-northwestern direction through the southernmost part of Limburg, which in its turn is the most southern province of the Netherlands, it flows into the Meuse, north of the city of Maastricht.
A tributary of the Geul is the Gulp.
Places through which the Geul passes are among others Kelmis (Belgium), Valkenburg aan de Geul and Meerssen (Netherlands).
