It rises in the Stogovo mountain at an altitude of around 2000 meters, and flows eastwards through the valley of Kičevo. At Makedonski Brod it turns northwards, flows between the mountains of Suva Gora and Karadžica, finally flowing into the Vardar in the Skopje suburb Gjorče Petrov.
Three dams have been built on Treska:
- Opća enciklopedija Jugoslavenskog leksikografskog zavoda - Zagreb, 1982. (2. izdanje)
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