Mynydd Tarw (pronounced [ˈmənɨð ˈtaru]) is a subsidiary summit of Cadair Berwyn in north east Wales.

It used to have a top: Rhos which has now been deleted as a Nuttall.

The summit has a large shelter cairn.

The views are extensive, with the lower; northern and western Berwyns visible, including Pen Bwlch Llandrillo.

Cadair Berwyn, Godor, Moel yr Ewig and Foel Wen are also in view.