The Eyserbeek (Dutch pronunciation: [ˈɛisərbeːk]; Limburgish: Ezerbaek [ˈeːzəʀbɛːk])[tone?]

The Eyserbeek is a right-bank tributary to the river Geul, which later joins the Meuse.

Rising in Bocholtz and flowing through Simpelveld and Eys, the Eyserbeek eventually drains in the river Geul in Gulpen.

Sources of the Eyserbeek can be found in Bocholtz near Hoeve Overhuizen,[2][3] from where it passes the N281 provincial road, before flowing through the town square of Simpelveld.

[2] The Eyserbeek eventually drains in the river Geul near the former Motte-and-bailey castle Gracht Burggraaf in Gulpen, where also the Gulp River joins the Geul from the opposite bank.