| Climber Name | # Ascents Recorded | Notes |
|---|---|---|
| Jacob Amos | 2 | |
| James W Puttrell | 2 | |
| Jean Claude Droyer | 2 | |
| Jeramie Claussen | 2 | |
| Jerome Mowat | 2 | Features in Lock Down Rock Up. |
| Jess Walker | 2 | |
| Jill Lawrence | 2 | |
| Jim Collins | 2 | |
| Jim Holloway | 2 | References[1] Interview with Climbing.com, July 2007 https://www.climbing.com/news/the-complete-jim-holloway-interview/ |
| Jim Hulbert | 2 | |
| Jim Moran | 2 | https://www.facebook.com/rockarchivist/photos/a.115405983249621/121210006002552 |
| J J Mah | 2 | |
| John Brock | 2 | |
| John Hartley | 2 | |
| John Menlove Edwards | 2 | References[1] Perrin, J. (1993). Menlove: The Life of John Menlove Edwards. United Kingdom: Ernest Press. [2] https://open.spotify.com/episode/36tUZibMMhAB4fmjz3X1pq? [3] https://footlesscrow.blogspot.com/2015/11/a-black-rainbow-life-and-times-of.html |
| John Schindler | 2 | |
| John Stainforth | 2 | |
| John Thornton | 2 | |
| John Yablonski | 2 | References[1] Portrait by Dean Fidelman, 1978 https://www.instagram.com/p/Bz_TXWJjs6R/ |
| Jonas Schild | 2 |