Some 76 km long, it flows generally northward through the small towns of Au in der Hallertau, Rudelzhausen, Mainburg, Siegenburg, and Abensberg.
She was the only child of Herman III, Count of Celje (b. 1380? - d. after falling from his horse, 30 July 1426), by his first wife, Elisabeth (b. 1377? - d. bef. 1423), daughter of Baron Johann II of Abensberg and widow of Ulrich II of Schauenburg.