| From: | United Kingdom 🇬🇧 |
| Date of birth: | 27th Dec 1998 |
| Age: | 27 years old |
| Gender: | Male |
| Hardest Boulder (Worked): | 9A |
| Hardest Boulder (Flash): | 8B+ |
| Hardest Sport (Worked): | 9b+ |
| Hardest Sport (Onsight): | 8b |
| Hardest Sport (Flash): | 8b+ |
| Notable Partnerships | |
| Aidan Roberts | |
Will Bosi is a climber from Edinburgh in Scotland. He started out as a competition climber, first progressing through national competitions and then European youth comps where he had a string of podium finishes. He struggled somewhat to replicate the successes of the youth comps in the adult circuit, with his best performances being two 4th place finishes in 2019.
Since retiring from comps he has turned to sport climbing and bouldering outdoors, where he has been extremely successful. In 2020 he became the second British climber to climb 9b sport with his repeat of La Capella. He then replicated this success in 2021 with hard first ascents and repeats including among others:
Since 2022 he has focused more on bouldering, where he has also excelled. For example he flashed Charizard 8B+ and, as of 2024, has climbed five 9A boulders:
[1] My Climbing Journey April 2023, https://www.youtube.com/watch?v=ZmmMbpCsSuA
[2] https://www.youtube.com/watch?v=Cn1dJNPfAfc
[3] https://www.climbing.com/people/interview-will-bosi-spots-of-time/
[4] Interview with Emil Abrahamsson Jan 2026 https://www.youtube.com/watch?v=OygaAqejUTg