The Traisen River is a river located in Austria, flowing through the regions of Lower Austria and Upper Austria. It is approximately 100 kilometers long and is a tributary of the Danube River. The river originates in the Mühlviertel region and travels southeast, passing through several towns and villages along its course. The Traisen River is known for its scenic landscapes and recreational opportunities. It supports various activities such as fishing, kayaking, and hiking along its banks. The river also plays a role in local ecosystems, providing habitat for diverse wildlife and contributing to the area's natural beauty.