| Name | Type |
|---|---|
| Clogwyn Du'r Arddu Interim Guide (1942) | Guidebook |
| Cléder Bouldering Topo | Guidebook |
| Coe Crag West (2026) | Guidebook |
| Cornwall (1950) | Guidebook |
| Cornwall Supplement (1955) | Guidebook |
| Cornwall Volume I (1968) | Guidebook |
| Cornwall Volume II (1966) | Guidebook |
| Cornwall-West Penwith (1984) | Guidebook |
| Craig Lundie - Rock Climbing Guide (2020) | Guidebook |
| Craig Yr Ysfa Interim Guide (1943) | Guidebook |
| Craig y Longridge (2017) | Guidebook |
| Creag Dhubh na Caillich Dry Tooling Miniguide (2023) | Guidebook |
| Culver Cliff Climbs | Guidebook |
| Culver Cliff, Isle of Wight (2021) | Guidebook |
| Cwm Crafnant (2008) | Guidebook |
| Cwm Glas (1970) | Guidebook |
| Cwm Idwal (1974) | Guidebook |
| Cwm Idwal (1958) | Guidebook |
| Cwm Idwal (1936) | Guidebook |
| Cwm Idwal (1967) | Guidebook |