| Climber Name | # Ascents Recorded | Notes |
|---|---|---|
| Léo Billion | 1 | |
| Leo Dickinson | 1 | |
| Leo Gheza | 1 | |
| Leo Moger | 1 | |
| Leonard Coyne | 1 | |
| Leo Wolfe | 1 | |
| Levente Pinter | 1 | |
| Libby Peter | 1 | |
| Lilian Bonniot | 1 | |
| Lily Fitzgibbon | 1 | |
| Lily Keal | 1 | |
| Linda Sjödin | 1 | |
| Linus Raatz | 1 | |
| Lionel Clerc | 1 | |
| Lionel Terray | 1 | |
| Livia Jakob | 1 | |
| Livvy Gent | 1 | |
| L J Griffin | 1 | |
| Logan Barber | 1 | |
| Louis Gundolf | 1 |