| Climb Name | Type | Grade | # Ascents Recorded | Notes | Exclude Reason |
|---|---|---|---|---|---|
| Memorias de una Sepia | Sport route | 8a | 1 | ||
| Menstrual Gossip | Trad climb | E6 | 1 | ||
| Merchant of Menace | Sport route | 8b | 1 | ||
| Merlin | Trad climb | E6 | 1 | ||
| Mescalito | Sport route | 7c+ | 1 | ||
| Metropolis | Boulder problem | 8C | 1 | Ireland's first 8C. |
|
| Mezzogiorno di Fuoco | Sport route | 8b | 1 | ||
| Mia Julia | Deep water solo | 8a | 1 | ||
| Michael Knight Wears a Chest Wig | Trad climb | E7 | 1 | ||
| Mickledore Grooves | Trad climb | VS | 1 | ||
| Midnight Summer Dream | Trad climb | E5 | 1 | ||
| Milky Way | Trad climb | E6 | 1 | ||
| Mille Millions de Mille Sabords | Sport route | 8b | 1 | ||
| Mindbridge | Trad climb | E7 | 1 | ||
| Mind Riot | Trad climb | E10 | 1 | ||
| Mine de Rien (Assis) | Boulder problem | 7C | 1 | ||
| Mineshaft | Trad climb | VD | 1 | Most likely climbed centuries ago by lead miners. |
|
| Mingus | Sport route | 8a | 1 | ||
| Minimal Techno | Sport route | 8a | 1 | ||
| Mirage | Sport route | 7c+ | 1 |