Ordered by the number of ascents recorded.
| Climb Name | Type | Grade | # Ascents Recorded | Notes | Exclude Reason |
|---|---|---|---|---|---|
| Obsession | Sport route | 9b | 1 | ||
| Øgletryne | Sport route | 8a | 1 | ||
| Oh Saint Léger Fait Moi Monter au Relais | Sport route | 8a+ | 1 | ||
| Oisiiyo | Sport route | 7c+ | 1 | ||
| Okachi | Sport route | 9a+ | 1 | ||
| One Punch | Sport route | 9a+ | 1 | ||
| Onigoroshi | Sport route | 7c+ | 1 | ||
| Opal | Sport route | 8b+ | 1 | ||
| Open Your Eyes | Sport route | 8c | 1 | ||
| Open Your Mind Direct R2 | Sport route | 9a+ | 1 | ||
| Orange Mécanique | Sport route | 8a | 1 | ||
| Orange Sunshine | Sport route | 7c+ | 1 | ||
| Orion | Sport route | 7c+ | 1 | ||
| Orujo | Sport route | 9a+ | 1 | ||
| Ouélamola | Sport route | 9a+ | 1 | ||
| Ouish Finale | Sport route | 8c | 1 | ||
| Ouragan | Sport route | 8a | 1 | ||
| Out of My Tree | Sport route | 8a | 1 | ||
| Out of Time | Sport route | 9a | 1 | ||
| Overdose | Sport route | 8a+ | 1 |