| Climber Name | # Ascents Recorded | Notes |
|---|---|---|
| Jean-Paul Finne | 1 | |
| Jeff Beaulieu | 1 | |
| Jeff Lowe | 1 |
American alpinist, pioneer of ice and mixed climbing, rock climber and entrepreneur. Lifetime Piolet D'Or recipient. References |
| Jemima Churchhouse | 1 | |
| Jenn DeBellis | 1 | |
| Jenny Lavarda | 1 | |
| Jeremy Fullerton | 1 | |
| Jeremy Holmes | 1 | |
| Jeremy Smith | 1 | |
| Jérôme Jean-Charles | 1 |
Bleausard bouldering pioneer. Chipped and climbed the first 7B in the forest Le Carnage in 1977.
In the 1980s, he climbed the entire Cuvier white circuit wearing trainers. References[1] Godoffe, J. 'Blocs en Stock: Le Cuvier', 1993 |
| Jesse Guthrie | 1 | |
| Jesse Huey | 1 | |
| Jessica Mccaskey | 1 | |
| J. F. Hamilton | 1 | |
| Jim Burton | 1 | |
| Jim Campbell | 1 | |
| Jim Herson | 1 | |
| Jim Hougaard | 1 | |
| Jim Madsen | 1 |
Yosemite climber of the 1960s. Died attempting to rescue Chuck Pratt and Chris Fredericks from the Dihedral Wall (A3) during a storm. The first fatal accident of a climber in Yosemite References[1] https://publications.americanalpineclub.org/articles/12196949602/James-Thomas-Madsen-1947-1968 [2] https://publications.americanalpineclub.org/articles/13196901702 [3] Mountain Issue 1 (1969) page 1 /library/7793/mountain-1 |
| Jim Melrose | 1 |