| Climber Name | # Ascents Recorded | Notes |
|---|---|---|
| Iain Brown | 0 | |
| Iain Miller | 0 |
References[1] https://www.ukclimbing.com/news/2014/10/iain_miller_sea_stack_ascensionist_extraordinaire-69207 |
| Ian Cartwright | 0 | |
| Ian Cheshire | 0 | |
| Ian Elliott | 0 |
References |
| Ian Hill | 0 | |
| Ian Horrocks | 0 | |
| Ian Howell | 0 | |
| Ian Lonsdale | 0 | |
| Ian McNaught Davis | 0 | |
| Ian Montadon | 0 | |
| Ian Smith | 0 | |
| Ian Vincent | 0 |
Strong Bradford-based sport climber active in the 80s and 90s. References[1] https://ukbouldering.com/threads/ian-vincent-rip.23577/page-2 |
| Ian Yurdin | 0 | |
| Iker Arroitajauregi | 0 | |
| Ilja Auersperg | 0 | |
| Imashi Hashimoto | 0 | |
| Ines Papert | 0 |
German ice, rock, alpine and competition ice climber, most known for her difficult mixed and alpine ascents. |
| Inge Perkins | 0 | |
| Iñi Basterra | 0 |