69.71 ha (172.25 acres)

Grid reference:


Gallt, or allt, comes from the Welsh for 'wooded hillside'. The sessile oak wood at Allt Rhyd y Groes - characteristic of woodlands in this part of Wales - hangs onto the steep northeast-facing slope of a hillside that spreads for over 70 hectares. Part wooded and part open, the reserve takes in craggy heathland, grassland, tumbling streams and some fascinating and very rare species - all tucked up inside this northern Carmarthenshire valley. The reserve is part of the Cwm Doethie - Mynydd Mall'n Site of Special Scientific Interest (SSSI) and Special Area of Conservation (SAC).