Will Bosi


United Kingdom
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Will is 22 and based in Edinburgh, Scotland. At 17, Will became the youngest Brit to climb 9a at the time with Rainshadow at Malham Cove. Since then, Bosi has become one of the leading lights of GB Climbing. In 2018, he reached the final of IFSC Chamonix Lead Climbing competition which was the first time a male had reached a lead final since 1998. In 2020, Bosi became the first Brit to climb 9b abroad with his ascent of La Capella. If confirmed at 9b+, Bosi would be the first Brit to climb the grade with his ascent of King Capella, placing him in an elite club at the top tier of the sport.



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adidas Outdoor, Entre-Prises & Hard Bar
View the reviews and news from Will's sponsors.

Best IFSC Results

This athlete has competed internationally

Latest News & Articles

News posts and Articles featuring Will

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

22-year-old Will Bosi has claimed the first ascent of King Capella at Siurana in Catalonia, Spain and has proposed the grade of 9b+. If confirmed, it would make him the first British climber and only the sixth person in the world to cli...

News 2020 - A Year of Climbing News

2020 will be a year that most will hastily forget, with COVID-19 overshadowing the majority of the year. With much of the UK locked down throughout 2020, it's a wonder that we have much to reflect upon at all in our annual roundup. 

News GB Climbing awarded £450K UK Sport Progression Funding

UK Sport has announced plans to invest £352 million in Olympic and Paralympic sport, including progression funding for seven sports - one of which is climbing.

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

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

GB Climbing's Molly Thompson-Smith has qualified in 5th place for...

News IFSC European Championships Moscow (Olympic Qualifying Event) Livestreams

The IFSC European Championships in Moscow are taking place over the coming days...

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

Will Bosi has flashed Isla De Encanta (Font 8B) on the Shelter Stone at Trowbarrow. With his ascent, Will joins a...

Video Reset Part 2 - Reopening the Walls with the ABC

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

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

News Practice of the Wild 8C by Will Bosi

News First Repeat of Hunger 9a by Will Bosi

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

News 3rd Place for Will Bosi in Uster EYC

News Jungle Speed & A Muerte by Will Bosi

Newsflash Rainshadow 9a for 17 year-old William Bosi

Latest Reviews for Will's Sponsors

Reviews from the UKC editorial team

Five Ten Hiangle, Hiangle LV and Hiangle Pro

Rob Greenwood looks at the three recent models in Five Ten's Hiangle range - the Hiangle, Hiangle LV and Hiangle Pro. The latter, in particular, is a very different beast from the others, he says. But which is his favourite?

Five Ten Crawe - a performance all-rounder

The Crawe manages to blend excellent technical performance on edges with good all-round use and comfort, reckons Theo Moore. It's rare that a climbing shoe gets this right, and as a result the Crawe is brilliant for both routes and bouldering.

Comfy All-Day Rock Shoes

For beginners taking their first steps on the rock, or more experienced climbers looking for a foot-friendly rock shoe for long routes and lower-grade days, a flatter and more neutral model may be preferable to the toe-cramping asymmetry of a downturned...

Micro Cams

Micro cams are among the most useful pieces of gear on a trad climber's rack. Having a tiny cam you can rely on to protect otherwise...

Friction Labs Secret Stuff & Secret Stuff AF

Team Sky built their cycling success around making marginal gains, and Friction Labs Secret Stuff liquid chalk...

Performance Rock Shoes - Women's/LV Fit

In this group test we compare nine pairs of performance shoes with a women's / low volume fit. How did they all do...?

DMM Dragonfly Micro Cams

DMM's long-anticipated entry into the micro cam market was worth the wait, says Theo Moore

Latest News from Will's Sponsors

Announcements direct from manufacturers


Climb after climb, the adidas Five Ten NIAD VCS Climbing Shoes deliver all-around performance. Versatile Stealth® C4™ rubber edges, grips and smears across all surfaces, indoors and out. Extended toe rubber maximises contact area for increased ...

New Climbing Gear Spring/Summer '21

Next up in our Spotlight gear round-ups is climbing gear. We've chatted with brands about the latest hardware, ropes, harnesses, helmets and every other form of gear. Plus, everything is hitting the shops imminently...

New Footwear Spring/Summer '21

In the absence of any trade show this year, we've created our own. Normally, shows tend to focus on products hitting the market in 6 months to a year, but we've asked brands to talk about the new kit available now. In this first round up, we're showing off...

Five Ten Hiangle Pro

Made for the demands of modern bouldering competitions, these climbing shoes are built on the same last and with the same materials...

The New Five Ten Hiangle - an update of a classic

Built on the same last as the previous Hiangle, these shoes are built for high-precision...

Five Ten CRAWE

Designed in collaboration with Swiss bouldering legend Fred Nicole for technical bouldering or sport routes, these climbing shoes...

adidas Terrex FREE HIKER Parley

These lightweight hiking shoes deliver freedom of movement and long-distance comfort for all terrains. The sock-like adidas...

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