Dreisam in the context of Rotbach (Dreisam)

Freiburg im Breisgau or simply Freiburg is the fourth-largest city of the German state of Baden-Württemberg after Stuttgart, Mannheim and Karlsruhe. Its built-up area has a population of about 355,000 (2021), while the greater Freiburg metropolitan area ("Einzugsgebiet") has about 660,000 (2018).

Freiburg is located at the southwestern foothills of the Black Forest, on the Dreisam River, a tributary of the Elz. It is Germany's southwestern- and southernmost city with a population exceeding 100,000. It lies in the Breisgau, one of Germany's warmest regions, in the south of the Upper Rhine Plain. Its city limits reach from the Schauinsland summit (1,284 metres (4,213 ft)) in the Black Forest to 3 kilometres (1.9 mi) east of the French border, while Switzerland is 42 kilometres (26 mi) to the south. The city is situated in the major wine-growing region of Baden and, together with Offenburg, serves as a tourist entry-point to the scenic Black Forest. According to meteorological statistics, Freiburg held the all-time German temperature record of 40.2 °C (104.4 °F) from 2003 to 2015.