| Climber Name | # Ascents Recorded | Notes |
|---|---|---|
| Chris Knuth | 1 | |
| Chris Marley | 1 | |
| Chris Terry | 1 | |
| Christophe Bichet | 1 | References |
| Christoph Hainz | 1 | |
| Christoph Hanke | 1 | |
| Christoph Schweiger | 1 | Christoph Schweiger was a young German climber who sadly died aged 21 when he was struck by a car in 2023. References |
| Chris Watts | 1 | |
| Chris Weidner | 1 | |
| Cintia Percivati | 1 | |
| Clark Alston | 1 | References[1] The Shale Trail: Adventure Climbing in the South West by Clark Alston. On The Edge 117, page 38. |
| Claude Dean Frankland | 1 | |
| Claude Lorenzi | 1 | |
| Claudie Dunn | 1 | |
| Clay Gordon | 1 | |
| Cole Bradburn | 1 | |
| Colin Wills | 1 | |
| Connie Shang | 1 | |
| Conrad Piper-Ruth | 1 | |
| Cooper Doe | 1 |