| Climber Name | # Ascents Recorded | Notes |
|---|---|---|
| Mal Duff | 0 | |
| Marcel Rémy | 0 | References[1] https://www.youtube.com/watch?v=XUfK-N_SMTo [2] A Climber We Lost: Marcel Remy by climbing.com, January 2023 https://www.climbing.com/people/remembering-marcel-remy-99/ |
| Marco Scolaris | 0 | The founder of the International Federation of Sport Climbing (IFSC), the organisation responsible for managing many international climbing competitions. |
| Margaret Jackson | 0 | 1843 - 1906. Described as "one of the greatest women climbers of her generation". The first woman to publish in the alpine club journal without having to use a pseudonym when she wrote up an account of her first winter ascent of the Jungfrau. It was on this route that she was forced to bivouac and suffered severe frost bite which led to the loss of several toes and her retirement from climbing in 1889. |
| Maria Cranor | 0 | References[1] https://www.youtube.com/watch?v=lwimfJFAB3Y [2] Climbers We Lost March 2024, by Russ Clune https://www.climbing.com/people/remembering-maria-cranor/ |
| Marie Uri | 0 | |
| Marjan Keršič | 0 | References |
| Mark Chapman | 0 | References[1] Obituary on climbing.com, Jan 2025 https://www.climbing.com/people/a-climber-we-lost-mark-chapman |
| Mark Croxall | 0 | |
| Markel Mendieta Uribarren | 0 | |
| Mark Glaister | 0 | |
| Mark Kemball | 0 | |
| Marko Siivinen | 0 | |
| Mark Reeves | 0 | |
| Mark Turnbull | 0 | |
| Mark Twight | 0 | |
| Markus Jung | 0 | |
| Mark Vallance | 0 | References[1] Remembering Mark Vallance by Tom Briggs, 2018 https://www.ukclimbing.com/articles/features/remembering_mark_vallance-10492 |
| Marsha Balaeva | 0 | |
| Martin Feistl | 0 | References[1] https://explorersweb.com/free-soloist-dies-in-40m-fall/ [2] https://www.planetmountain.com/en/news/alpinism/martin-feistl-perishes-on-scharnitzspitze.html |