The finding of Nothofagus obliqua var. obliqua and N. dombeyi along the banks of Claro River (Chile, 7th Region) (35° 08' 15" to 35° 10' 45 " S - 71° 23' 30" W) when is cuts across the central valley is reported. An account of the associated flora is given and the origin of this new distributional site is discussed.