Lauf is situated on the western edge of the Black Forest (Schwarzwald), located in a valley (Laufbachtal) that slopes roughly east-west. The Laufbach stream which gives Lauf its name rises on the north-west side of the Hornisgrinde, and descends rapidly past the Glashutte towards Lauf. In the Laufbachtal and side valleys, native vegetation flourishes, including orchids.