Largest tributaries
The Vorderrhein or Anterior Rhine, is the left of the two initial tributaries of the Rhine (the other being the Hinterrhein). It is 76 km long and it is longer than the Hinterrhein, but has a lower discharge than the latter at their confluence, which marks the beginning of the Alpine Rhine section.
The Vorderrhein and nearly all of its tributaries are located in the Swiss canton of Grisons (Graubünden), with the largest communities along the river being Disentis and Ilanz. One of its upper tributaries, the Rein da Medel, rises in the canton of Ticino.
