| Climber Name | # Ascents Recorded | Notes |
|---|---|---|
| Marco Ghisio | 1 | |
| Marco Giudice | 1 | |
| Marietta Uhden | 1 | References[1] https://www.planetmountain.com/en/news/climbing/marietta-uhden-goodbye.html |
| Marius Larrieu | 1 | |
| Mark Campbell | 1 | |
| Mark Hundleby | 1 | |
| Mark Klemens | 1 | |
| Mark Lynden | 1 | |
| Mark McGivern | 1 | |
| Mark McQuade | 1 | |
| Marko Lukic | 1 | |
| Mark Radtke | 1 | |
| Mark Savage | 1 | |
| Mark Synnott | 1 | |
| Martina Čufar | 1 | References[1] http://onceuponaclimb.co.uk/portfolio-posts/martinacufarinterview-2-2/ |
| Martin Corbett | 1 | |
| Martin Crook | 1 | |
| Martin Moser | 1 | |
| Martin Scheel | 1 | |
| Martin Schidlowski | 1 |