The Dorna is a right tributary of the river Bistrița, in Romania. It discharges into the Bistrița in Vatra Dornei. It flows through the villages Dornișoara, Poiana Stampei, Podu Coșnei, Dorna Candrenilor and the town Vatra Dornei. Its length is 53 kilometres (33 mi) and its basin size is 608 square kilometres (235 sq mi).

Tributaries

The following rivers are tributaries to the river Dorna (from source to mouth):

• Left: Tihul, Dornișoara, Teșnița, Teșna, Izvorul Alb, Doceni
• Right: Bârsaniul, Prislop, Roșia, Alexeni, Negrișoara, Secu, Colăcelul, Pârâul Roșu