Cyrn Las (The Grey Horn) or Diffwys Ddu (The Black Precipice) as it has been known in Welsh over the years, is a high mountain crag with a big feel. There are many classic routes, and none finer than Main Wall or The Grooves. There is also a host of other harder routes that are long and sustained with highly technical and demanding sections, such as Lubyanka and The Skull. This crag is steeper than Lliwedd and Cloggy and the climbing can be even more committing. Good mountain sense and route-finding abilities play crucial roles in helping you avoid becoming one of the many people who get off route on Main Wall.


7 trad routes (HS...E4)
Graded List of Routes
List of First Ascents
Buttress (click for routes) No. of Routes Route Type Sunshine
or shade
Approach walk Other
Cyrn Las Routes
No description as yet.
Early morning sun

40 mins

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  • Latest Comments

    For CYRN LAS

    "Really enjoyable with some good climbing and a crux right where tit should be at..." 15/Dec

    The Grooves
    "Not the best E1 in Wales although very good. Surely p3 is 5a?" 03/May

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