Will Bosi

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United Kingdom

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Edinburgh born Will Bosi is one of the world's top climbers. At just 17 years of age, Will became the youngest Brit to have climbed 9a with his repeat of Rainshadow at Malham Cove. In 2018 he became first British male in 20 years to reach the final of a lead World Cup, and in 2021 he made the first ascent of his hardest route to date, King Capella, which he proposed at 9b+.

More recently, Will has turned his attentions towards bouldering, where he has quickly established himself as one of the leading lights of the scene, with three 9A ascents in just eighteen months.

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Latest News & Articles

News posts and Articles featuring Will

Fri Night Vid Sir William and the Quest for the Holy Jug

This week's Friday Night Video is a holy quest. We join Sir William Bosi in his crusade to tick Excalibur, Stefano Ghisolfi's 9b+ near Arco, Italy.

16 30 May

News Will Bosi establishes Realm of Tor'ment, 9A

In proposing a grade of 9A, Will becomes the first person to have climbed five boulders at the grade.

9 20 May

News New 8C+ and 8C boulders for Will Bosi

Will Bosi has made the first ascents of two new hard boulders in Switzerland, Brain Rot, 8C+, in Magic Wood, and Kyanite, 8C, in Val Bavona.

2 15 May

News Will Bosi makes First Ascent of Sintra's Hardest Boulder

Will Bosi has made the first ascent of El Dorado Sit, a new 8C boulder in Sintra,...

26 Mar

News Will Bosi flashes Janja SD 8B+

Will Bosi has made a flash ascent of Janja SD, 8B+, in Moravsky Kras, in the Czech Republic.

3 4 Nov, 2024

News Will Bosi flashes Dune, 8B+

Will Bosi has made a flash ascent of Jana Švecová's Dune, 8B+, at Stařechovícký Lom, Czech Republic.

5 30 Oct, 2024

News Will Bosi repeats Spots of Time, 9A

Will Bosi has made the second ascent of Aidan Roberts' Spots of Time, 9A.

11 21 Oct, 2024

News First and Second ascents of Bultitude, 8B+

7 16 Apr, 2024

News Will Bosi climbs Return of the Sleepwalker 9A

9 21 Feb, 2024

News Will Bosi climbs Sleepwalker, 8C+

2 22 Jan, 2024

Fri Night Vid Our Favourite Climbing Films from 2023

3 29 Dec, 2023

News Will Bosi upgrades Nova to 8C

8 Nov, 2023

Fri Night Vid Lords of Trad | Adam Ondra, Pete Whittaker and Will Bosi

18 6 Oct, 2023

Article Kendal 2023: The Future of Hard Bouldering - Will Bosi, Jerry Moffatt, Shauna Coxsey

25 Sep, 2023

News Second ascent of Ultra Instinct, 8C, for Will Bosi

5 13 Jun, 2023

Video Will Bosi on Burden of Dreams: The Film

6 Jun, 2023

Video Will Bosi climbs Alphane, 9A

2 5 Jun, 2023

News Will Bosi makes second ascent of Isles of Wonder Sit, suggests 8C

22 May, 2023

News New Peak District 8C for Will Bosi

3 May, 2023

Video Will Bosi | My Climbing Journey

20 Apr, 2023

Newsflash First Repeat of Burden of Dreams 9A by Will Bosi

27 14 Apr, 2023

Video Will Bosi talks Burden of Dreams, 9A replicas, and plans for the future

2 6 Apr, 2023

News Will Bosi flashes Graceland, 8B+

10 Feb, 2023

News Will Bosi flashes The Dagger, 8B+

2 8 Dec, 2022

News Ephyra 8C+ by Will Bosi

14 Nov, 2022

News Will Bosi claims the third ascent of Alphane

7 2 Nov, 2022

The Ticklist Will Bosi Boulders New Peak 8C+ and Classic Rock Round Record Broken

19 Aug, 2022

News Will Bosi Proposes Peak District's Hardest Problem: Honey Badger 8C+

8 12 Aug, 2022

News First Ascent of Scotland's Hardest Sport Route by Will Bosi - Free at Last 9a+

14 4 Jul, 2022

Fri Night Vid Will Bosi: Summer Sends

1 Jul, 2022

News Two Font 8Cs in a week for Will Bosi

9 14 Jun, 2022

The Ticklist Japan dominates the World Cup, Ramsden and Miller, and Will Bosi crushing

4 13 May, 2022

The Ticklist VIDEO - Bosi's World Class Trip, Soline Kentzel on El Cap, and Luke Dawson's First 9a

3 29 Apr, 2022

News Will Bosi on Form in Czech Republic

3 26 Apr, 2022

The Ticklist VIDEO - Hard Trad for Cookson and Wright, 9a+ for Berthier and flashes from Bosi

21 Apr, 2022

Video Rab CWIF Semi-Finals and Finals Live Stream Today

20 Mar, 2022

The Ticklist #59 E8 solo by Anna Taylor, Patagonian Link-up and Hard Boulders

2 28 Jan, 2022

The Ticklist #58 Alpine Ticks, Bosi, Raboutou and Ondra

5 21 Jan, 2022

News 2021 - A Year of Climbing News

30 Dec, 2021

News Alex Megos Repeats King Capella - 9b+?

5 22 Nov, 2021

Video Will Bosi talks Raven Tor routes and future plans

16 Nov, 2021

The Ticklist #50 Hard Sport Climbing

12 Nov, 2021

Newsflash First Ascent of Brandenburg Gate Project by Will Bosi, Proposes 9a+

23 8 Nov, 2021

Newsflash First Repeat of Mutation 9a by Will Bosi, Proposes 9a+

28 2 Nov, 2021

News Successful Trip to Switzerland for Will Bosi

2 20 Oct, 2021

The Ticklist #33 Will Bosi ticks Northern Lights, Hard Sport and Bouldering

2 11 Jun, 2021

Fri Night Vid An Interview with Will Bosi

15 Apr, 2021

News First Ascent of King Capella 9b+ by Will Bosi

59 29 Mar, 2021

News 2020 - A Year of Climbing News

5 28 Dec, 2020

News GB Climbing awarded £450K UK Sport Progression Funding

5 21 Dec, 2020

News Will Bosi and Molly Thompson-Smith make Combined Finals, Olympic Ticket within Reach

37 27 Nov, 2020

News Molly Thompson-Smith makes European Championship Lead Finals - Watch Live on BBC Sport

25 Nov, 2020

News IFSC European Championships Moscow (Olympic Qualifying Event) Livestreams

2 20 Nov, 2020

News Will Bosi flashes Isla de Encanta (Font 8B)

21 Sep, 2020

News Serenata 8C by Will Bosi

3 4 Sep, 2020

Video Reset Part 2 - Reopening the Walls with the ABC

24 Jul, 2020

News Superman Sit Start (Font 8B+) for Will Bosi

7 Jul, 2020

News Tomahawk 8B+ by Will Bosi

2 26 Jun, 2020

News Fast Ascent of Bewilderness (Font 8B+) for Will Bosi

5 5 Jun, 2020

Newsflash La Capella 9b by Will Bosi

18 5 Feb, 2020

News Practice of the Wild 8C by Will Bosi

2 4 Oct, 2018

News First Repeat of Hunger 9a by Will Bosi

31 3 Apr, 2018

News Will Bosi climbs The Prow (8A) at Kyloe

13 1 Aug, 2017

News Evolution 8c+ by Will Bosi

10 5 Jul, 2017

News 3rd Place for Will Bosi in Uster EYC

3 28 Jun, 2017

News Jungle Speed & A Muerte by Will Bosi

9 25 Apr, 2017

Interview Will Bosi on Hubble

28 Oct, 2016

Newsflash Will Bosi climbs Hubble 9a

20 25 Oct, 2016

Newsflash Rainshadow 9a for 17 year-old William Bosi

8 3 May, 2016

Latest Reviews for Will's Sponsors

Reviews from the UKC editorial team

OTS 2025 - Our Best of the Show

The Outdoor Trade Show has just wrapped up, and after a few quiet years post-Covid, 2025 saw a strong showing for new ideas and interesting products. Here are our highlights of the show - the items our review team are going to be fighting over ...

20 13 Jun

Head to Head: DMM Cortex vs Black Diamond Hydra Ice Axes

Two new axes are turning heads this season - the Black Diamond Hydra and the DMM Cortex. Both seem destined to become familiar sights on our winter crags, but which is the one for you? We put them head to head to see how they stack up...

38 6 Mar

The Aether - DMM's New Lightweight Quickdraw

Replacing the Chimera, the new Aether has the benefits of a clean-nosed design and good ergonomics, while still being really lightweight - a major advantage for mountain trad and alpine rock, says John McKenna.

3 10 Oct, 2024

OTS 2024 - Our Best of the Show

The 2024 Outdoor Trade Show has just concluded. Over a busy three days our team clocked up an impressive mileage...

16 21 Jun, 2024

UKC / UKH Gear of the Year 2023

Our reviewers see a lot of gear, and while most is pretty good there will always be a few real stand-outs. Looking back...

6 Dec, 2023

OTS 2023 - Climbing Gear

At OTS 2023 in Liverpool we got a chance to check out some of the new climbing gear due to hit the shelves next year: a range of...

24 21 Jun, 2023

OTS 2023 - Our Best of the Show

This year's Outdoor Trade Show has just wrapped up. Staged in a tropical Liverpool, the show brought practically all the...

3 16 Jun, 2023

Latest News from Will's Sponsors

Announcements direct from manufacturers

Write a review, win £100 DMM kit!

We want your help to populate our product reviews with your experience in using them, and you could win £100 of DMM kit in return.

26 Sep, 2023

The new Adidas TERREX Skychaser Tech Mid GORE-TEX

The TERREX SKYCHASER TECH MID GORE-TEX merges key benefits of hiking and trail running shoes, ensuring comfort while supporting speed and agility.

18 Apr, 2023

How The Adaptive Climbing Group Built A Paraclimbing Community | adidas TERREX

If you don't know about the Adaptive Climbing Group yet, then it's time you met this inspiring paraclimbing community. Watch this film to see what happens on a day of outdoor climbing at the crag with a...

10 Nov, 2022