The Enz is a river flowing north from the Black Forest to the Neckar in Baden-Württemberg. It is 106 km long. Its headstreams – the Little Enz () and the Great Enz or Big Enz (Große Enz) – rise in the Northern Black Forest, the latter at Enzklösterle. In Calmbach, the Little Enz and the Big Enz join to form the Enz. The river passes through Neuenbürg and Pforzheim, where it leaves the Black Forest. It then flows through the cities of Vaihingen and Bietigheim-Bissingen. Along the lower course, wine is grown. Major tributaries to the Enz are Glems and Nagold (with its tributary Würm). Near Besigheim the Enz feeds into the Neckar. In earlier times the Enz was important for the timber rafting industry. Geography River system The Enz flows through two large natural regions: in the upper half of its course, the river and its tributaries drain the eastern half of the Northern Black Forest; later it flows through the southwest German Gäu landscape, mostly through the Neckar Basin. Including its main headstream, the Poppelbach, the Enz has a total length of about 105 kilometres. However, unusually, its right tributary, the Nagold, which discharges into the Enz in Pforzheim on emerging from the Black Forest, is longer - in fact almost twice as long as its own headstream to that point. In addition, the Nagold carries twice as much water at its mouth. Thus, above Pforzheim, the Nagold is hydrographically the main branch of the river system of the Enz, which is then about 149 kilometres long, and thus the third longest of the Neckar tributaries after the river systems of the Kocher and the Jagst. Headstreams The Enz bears its name without any qualifier until it reaches the town of Calmbach, where the Great Enz (Große Enz) and Little Enz (Kleine Enz) merge. The Great Enz has two headstreams, both approximately 5 kilometres long: the Poppelbach and the Kaltenbach, which unite at Gompelscheuer. As with the source of the Danube in Donaueschingen this purely nominal beginning of the (Great) Enz is symbolized by the nearby Enz Spring (Enzbrunnen) and, likewise, has been erroneously marketed as such to tourists. In terms of water quantity and size of catchment area, the Poppelbach, which flows from the south, is the main headstream, whilst the Kaltenbach, which flows from the west, has a slightly greater length and higher source. The Poppelbach