| Climb Name | Type | Grade | # Ascents Recorded | Notes | Exclude Reason |
|---|---|---|---|---|---|
| Megalomaniac | Boulder problem | 8B | 1 | ||
| Mega Tsunami | Trad climb | E6 | 1 | ||
| Meirionnydd | Trad climb | E7 | 1 | ||
| Mejorando la Samfaina | Sport route | 9b+ | 1 | ||
| Melkespannet | Boulder problem | 8B | 1 | Flatanger, Norway |
|
| Melkeveien Sitt | Boulder problem | 8B | 1 | Oslo, Norway |
|
| Melltith | Sport route | 8c | 1 | ||
| Melody | Trad climb | E8 | 1 | ||
| Meltdown | Trad climb | E7 | 1 | ||
| 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 |