| Climb Name | Type | Grade | # Ascents Recorded | Notes | Exclude Reason |
|---|---|---|---|---|---|
| One for the Road | Boulder problem | 8A+ | 1 | ||
| One Inch Punch | Trad climb | E9 | 1 | ||
| One in the Swarm | Trad climb | E8 | 1 | ||
| One Man and His Dogmas | Trad climb | E5 | 1 | ||
| One Night Stand | Sport route | 8c+ | 1 | ||
| One Punch | Sport route | 9a+ | 1 | ||
| One Redeeming Feature | Boulder problem | 7C+ | 1 | ||
| One Step Beyond | Trad climb | E6 | 1 | ||
| One Step Beyond | Boulder problem | 8A+ | 1 | ||
| Only Human | Trad climb | E5 | 1 | ||
| On The Beach | Boulder problem | 8B | 1 | ||
| Opal | Sport route | 8b+ | 1 | ||
| Open Book | Trad climb | E1 | 1 |
The first route to be graded 5.9 in the US. |
|
| Open Your Mind Direct R2 | Sport route | 9a+ | 1 | ||
| Ophir Broke | Trad climb | E5 | 1 | ||
| Orange Crush | Trad climb | E6 | 1 | ||
| Orange Mécanique | Sport route | 8a | 1 | ||
| Orange Sunshine | Sport route | 7c+ | 1 | ||
| Orb Weaver | Boulder problem | 7C+ | 1 | ||
| Orcrist | Trad climb | E5 | 1 |
Named after the "goblin cleaving" sword from Lord of the Rings. References |