Wales
Lan Ddu Cilwenau
331M
1086FT
About Lan Ddu Cilwenau
Rising above the rural landscape on the fringes of the Black Mountains, this modest 331m summit is a designated Hump and Tump. Its name suggests a dark, sheltered ridge, reflecting its position amidst the rolling Welsh hills. Though lower than its neighbours, it provides a quiet, open perspective over the surrounding valleys.
Key Statistics
Rank
831st Highest in Wales
Parent Range
Wales
Prominence
?
120m
Nearest Town
Sir Gaerfyrddin / Carmarthenshire
Geology
The ground beneath you is the Glanyrafon Formation, composed of repeating layers of ancient, compressed mud and sand.
Find It
OS Grid Reference
SN576369
Latitude
52.0122°N
Longitude
4.0763°W
Did You Know?
- •The name is derived from Welsh, where 'Lan' (a mutation of 'Glan') signifies a bank or hillside and 'Ddu' means black or dark. 'Cilwenau' translates to 'white nooks' or 'fair corners,' suggesting a landscape of sheltered, bright pockets tucked against the darker upland.
- •Standing on the western edge of the Black Mountains (Y Mynyddoedd Duon), the summit provides an excellent vantage point to study the 'Dragon’s Back' ridge on neighbouring Mynydd Troed directly across the valley to the west.
- •Despite its modest height, its status as a Hump ensures it has at least 100 metres of prominence, making the ascent feel like a more substantial undertaking than many taller points along the main mountain spines.
- •It is a prime choice for the walker who values solitude over status, as you are far more likely to share the summit with a stray sheep than a fellow hiker.