The Bicaz is a right tributary of the river Bistrița in Romania. Its source is in the Hășmaș Mountains. Its uppermost course, upstream from Red Lake (Lacul Roșu), is also called Vereșchiu. Other tributaries of Lacul Roșu are Pârâul Oii (Oaia), Licoș and Suhard. It discharges into the Bistrița in the town Bicaz. The Romanian name derives from the Hungarian name, which means literally frog-rivulet (hun.: béka = frog). Its length is 39 km and its basin size is 566 km2. The main tributaries of the river are: The Bicaz Gorge is part of the Cheile Bicazului-Hășmaș National Park.