| Climber Name | # Ascents Recorded | Notes |
|---|---|---|
| Ian Pitcairn | 1 | |
| Ian Riddington | 1 | |
| Ian Sykes | 1 | |
| Ian Turnbull | 1 | |
| Igor Koller | 1 | |
| Ila Tuunainen | 1 | |
| Illya Bakhmet-Smolenskyi | 1 |
Bakhmet-Smolenskyi claimed some hard ascents at a very young age, however, in 2022 – aged 17 – he made a controversial claim to have made an early repeat of No Kpote Only (8C+). He released a video of his ascent where his feet were cropped out and appeared to be walking on the floor, and a cut to the footage was made midway through a dynamic move. The ascent has not been widely recognised. References[1] https://www.lacrux.com/en/bouldern/illya-bakhmet-smolensky-repeats-no-kpote-only/ [2] No Kpote Only video: https://www.youtube.com/watch?v=Cw-GYmyUn2M&t=165s |
| Imogen Horrocks | 1 | |
| Ion Martinez | 1 | |
| Isaac Caldiero | 1 | |
| Isabelle Holloway | 1 | |
| Isabelle Patissier | 1 |
Isabelle was the first woman to climb 8b with her ascent of Sortillèges. |
| Isak Westin | 1 | |
| Ishmael Matinyman | 1 | |
| Issac Baxter | 1 | |
| Ivor Armstrong Richards | 1 | |
| Iziar Martinez | 1 | |
| Jacek Matuszek | 1 | |
| Jack Bradbrook | 1 | |
| Jack Mckechnie | 1 |