| Climb Name | Type | Grade | # Ascents Recorded | Notes | Exclude Reason |
|---|---|---|---|---|---|
| One Step Beyond | Boulder problem | 8B | 1 | ||
| Opal | Sport route | 8b+ | 1 | ||
| Open Your Mind Direct R2 | Sport route | 9a+ | 1 | ||
| Opium | Boulder problem | 8A | 1 | ||
| Orange Mécanique | Sport route | 8a | 1 | ||
| Orange Piranha | Boulder problem | 8A+ | 1 | ||
| Orange Sunshine | Sport route | 7c+ | 1 | ||
| Orchrist | Trad climb | E5 | 1 | ||
| Oreo | Boulder problem | 7C | 1 | ||
| Orgasmatron | Boulder problem | 8A | 1 | ||
| Original Route | Trad climb | HVS | 1 | ||
| Orion | Sport route | 7c+ | 1 | ||
| Orlok | Boulder problem | 8B+ | 1 | The problem is named after Count Orlok from the 1922 silent film Nosferatu. |
|
| Orujo | Sport route | 9a+ | 1 | ||
| Osebergskipet | Boulder problem | 8B | 1 | Vingsand, Norway |
|
| Ôte-moi d'un Doigt | Boulder problem | 8B+ | 1 | ||
| Ouragan | Sport route | 8a | 1 | ||
| Our Father | Trad climb | E4 | 1 | Probably one of the hardest free climbs in the UK when Tom Proctor made the first ascent. So named because Geoff Birtles spoke the Lord's Prayer before attempting to second Tom Proctor on the first ascent. |
|
| Out for Blood | Trad climb | E9 | 1 | The pitches breakdown as E8 6c in to E9 7a, a substantial outing! |
|
| Out of My Tree | Sport route | 8a | 1 |