| Climb Name | Type | Grade | # Ascents Recorded | Notes | Exclude Reason |
|---|---|---|---|---|---|
| Mascherina | Sport route | 8c | 1 | ||
| Massive Dynamic | Boulder problem | 8B+ | 1 | ||
| Masterclass | Sport route | 8a | 1 | Originally given 7c+ but now widely considered 8a making it the first of the grade in the UK (ahead of Statement of Youth). |
|
| Masters of the Universe | Trad climb | E7 | 1 | ||
| Master Spy | Trad climb | E4 | 1 | ||
| Match Made in Heaven | Boulder problem | 8B+ | 1 | ||
| Match Point | Sport route | 8b | 1 | ||
| Matière Grise | Boulder problem | 7C | 1 | Nicknamed Le Mur du Son or The Wall of Sound while it was a project due to its proximity to the nearby motorway. |
|
| Maulin' Angel | Boulder problem | 8B+ | 1 | ||
| Max Factor | Sport route | 9a | 1 | ||
| Maximising | Boulder problem | 8B | 1 | ||
| Maxwell's Demon | Boulder problem | 8B+ | 1 | ||
| Maxwell's Demon Low | Boulder problem | 8C+ | 1 | ||
| Mayan Skies | Trad climb | E7 | 1 | ||
| Meathook | Boulder problem | 8A | 1 | The first 8A in the world. |
|
| Me Cago en el Amor | Sport route | 8a | 1 | ||
| Mechanical Animals | Sport route | 8c | 1 | ||
| Megalithe | Boulder problem | 7C+ | 1 | ||
| Megalithe Assis | Boulder problem | 8A | 1 | ||
| Megalodon | Boulder problem | 8B+ | 1 |