| Climb Name | Type | Grade | # Ascents Recorded | Notes | Exclude Reason |
|---|---|---|---|---|---|
| Masters of the Universe | Trad climb | E7 | 1 | ||
| Master Spy | Trad climb | E4 | 1 | ||
| Match Point | Sport route | 8b | 1 | ||
| Matière Grise | Boulder problem | 7C | 1 |
Named after its brain-like appearance. 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 | ||
| Maupassant | Trad climb | HVS | 1 | ||
| Max Factor | Sport route | 9a | 1 | ||
| Maximising | Boulder problem | 8B | 1 | ||
| Max Power | Sport route | 8c | 1 | ||
| Maxwell's Demon Low | Boulder problem | 8C+ | 1 |
Right exit to Shrodinger's Cat |
|
| Meathook | Boulder problem | 8A | 1 |
Likely one of the first 8As in the world. |
|
| Me Cago en el Amor | Sport route | 8a | 1 | ||
| Mechanical Animals | Sport route | 8c | 1 | ||
| Mediterranean Dream | Sport route | 8a | 1 | ||
| Medusa Falls | Sport route | 7a | 1 | ||
| Mégalithe (assis) | Boulder problem | 7C+ | 1 | ||
| Mégalithe (assis gauche) | Boulder problem | 8A | 1 | ||
| Mega Tsunami | Trad climb | E6 | 1 | ||
| Megos's Project | Sport route | 9c (approx) | 1 | ||
| Meirionnydd | Trad climb | E7 | 1 |