The Tarrens are a compact group of mountains to the south of the great Cadair Idris and separated from it by the deep rift holding Llyn Mwyngil (better known as Tal-y-Llyn Lake).
Much encroached upon by forestry plantations though the Tarrens are, the main ridge linking Tarrenhendre with Tarren-y-Gesail still provides a fine walk, particularly for those with an interest in ancient burial cairns, since the former - at 2,076ft - possesses three examples in varying states of preservation at SH68350395, 6838203964 and 6839103998.
According to Coflein the round barrow is:
a 'large round barrow 12m diameter approx. with small stone cairn on centre which is clearly a later addition. Original round barrow is covered in peat with some stone now eroding out of it but is generally in good condition. Area of possible original stone quarrying to the W and NW of monument. Round barrow is approx.1.5m in height. Field boundary runs right over the middle of the monument'.
Note that the mountain is also the site of a Spitfire crash on 22/10/42........