| Climber Name | # Ascents Recorded | Notes |
|---|---|---|
| Juan Antonio Jimenez Portillo | 1 | |
| Julia Fiser | 1 | |
| Julia Kruder | 1 | |
| Julian Saunders | 1 | |
| Julie Pearson | 1 | |
| Juliet Hammer | 1 | |
| Junta Sekiguchi | 1 | |
| Jun Vilde Hunskår | 1 | |
| Juraj Rečka | 1 | |
| Kajsa Rosén | 1 | |
| Kalel Chester | 1 | |
| Kalle Olsson | 1 | |
| Karen Whitehouse | 1 | |
| Karl Lugmayer | 1 | |
| Karl Westling | 1 | |
| Katalin Paertan | 1 | |
| Kate Ennis | 1 | |
| Kate Gascoyne | 1 | |
| Kate Harrison | 1 | |
| Katie Landon | 1 |