| Climb Name | Type | Grade | # Ascents Recorded | Notes | Exclude Reason |
|---|---|---|---|---|---|
| One Inch Punch | Trad climb | E9 | 1 | ||
| One Night Stand | Sport route | 8c+ | 1 | ||
| One Redeeming Feature | Boulder problem | 7C+ | 1 | ||
| 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 Sunshine | Sport route | 7c+ | 1 | ||
| Orcrist | Trad climb | E5 | 1 | Named after the "goblin cleaving" sword from Lord of the Rings. References |
|
| 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 |
|
| Ossau Project | Boulder problem | 8B+ | 1 | ||
| Ôte-moi d'un Doigt | Boulder problem | 8B+ | 1 | ||
| Ouragan | Sport route | 8a | 1 |