The Alz River is a river located in Bavaria, Germany. It flows through the region of Lower Bavaria and is a tributary of the Danube River. The river is approximately 80 kilometers long and is known for its scenic landscapes and recreational opportunities, including fishing and hiking along its banks. The Alz River originates near the town of Alzenau and eventually merges with the Danube near München. The river plays a vital role in the local ecosystem and supports various wildlife species. Its waters are also used for irrigation and other agricultural purposes in the surrounding areas.