The cliff is known locally as Diffwys Ddu (The Black Precipice), but the earliest climbers for no very good reason transferred the name Cyrn Las to the cliff.
[1] Geoff Millburn Llanberis (1981) /library/7261/llanberis-pass
6 recorded climbs.
| Year | Climb | Grade | Climber | Style | Date | |
|---|---|---|---|---|---|---|
| 1953 | The Grooves | E1 | Joe Brown | Lead | 3rd Sep 1953 | |
| First ascent. With Don Cowan and Eric Price. 1 point of aid. | ||||||
| 1954 | ||||||
| 1955 | ||||||
| 1956 | ||||||
| 1957 | ||||||
| 1958 | The Overhanging Arete | E2 | Hugh Banner | Lead | 15th Jun 1958 | |
| First ascent. 1 point of aid. | ||||||
| 1959 | ||||||
| 1960 | ||||||
| 1961 | ||||||
| 1962 | Trauma Grooves | E1 | Baz Ingle | Alternate Leads | 26th May 1962 | |
| First ascent. With Pete Crew. 1 point of aid. | ||||||
| Trauma Grooves | E1 | Pete Crew | Alternate Leads | 26th May 1962 | ||
| First ascent. With Baz Ingle. 1 point of aid. | ||||||
| 1963 | The Great Buttress | E2 | Baz Ingle | Alternate Leads | 4th May 1963 | |
| First ascent. With Pete Crew. 1 point of aid. | ||||||
| The Great Buttress | E2 | Pete Crew | Alternate Leads | 4th May 1963 | ||
| First ascent. With Baz Ingle. 1 point of aid. | ||||||
| 1964 | ||||||
| 1965 | ||||||
| 1966 | The Skull | E4 | Al Williams | Alternate Leads | 1st May 1966 | |
| First ascent. 6 points of aid. | ||||||
| The Skull | E4 | Martin Boysen | Alternate Leads | 1st May 1966 | ||
| First ascent. 6 points of aid. | ||||||
| 1967 | ||||||
| 1968 | ||||||
| 1969 | ||||||
| 1970 | ||||||
| 1971 | ||||||
| 1972 | ||||||
| 1973 | ||||||
| 1974 | ||||||
| 1975 | ||||||
| 1976 | Lubyanka | E3 | Rob Matheson | Alternate Leads | onsight | 21st Aug 1976 | |
| First ascent. | ||||||
| Lubyanka | E3 | John Eastham | Alternate Leads | onsight | 21st Aug 1976 | ||
| First ascent. | ||||||
| Lubyanka | E3 | Ed Cleasby | Alternate Leads | onsight | 21st Aug 1976 | ||
| First ascent. | ||||||
| Climb | Grade | # Recorded Ascents | Ascents Recorded Between |
|---|---|---|---|
| The Skull | E4 | 4 | 1st May 1966 – 1st January 1975 |
| Lubyanka | E3 | 4 | 21st August 1976 – 1st January 1981 |
| The Overhanging Arete | E2 | 2 | 15th June 1958 – 1st January 1973 |
| The Great Buttress | E2 | 2 | 4th May 1963 |
| Trauma Grooves | E1 | 2 | 26th May 1962 |
| The Grooves | E1 | 1 | 3rd September 1953 |