| Climb Name | Type | Grade | # Ascents Recorded | Notes | Exclude Reason |
|---|---|---|---|---|---|
| Onigoroshi | Sport route | 7c+ | 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. |
|
| Opening gambit | Trad climb | HVS | 1 |
One of the first routes on slate, up the huge tottering back wall of Twll Mawr, the climb has been substantially altered by rockfall since Joe Brown’s first ascent and is now graded XS. An adventure strictly for connoisseurs. |
|
| Open Your Eyes | Sport route | 8c | 1 | ||
| Open Your Mind Direct R2 | Sport route | 9a+ | 1 | ||
| Ophir Broke | Trad climb | E5 | 1 | ||
| Optimus Prime | Boulder problem | 8B+ | 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 |
|
| Oreo | Boulder problem | 7C | 1 | ||
| Orgasmatron | Boulder problem | 8A | 1 | ||
| Oriflamme | Boulder problem | 7C | 1 | ||
| Original Route | Trad climb | VD | 1 |
E. A. Baker:
|
|
| Original Route | Trad climb | HVS | 1 |