| From: | United Kingdom 🇬🇧 |
| Date of birth: | 6th March 2002 |
| Age: | 23 years old |
| Gender: | Male |
| Height: | 181 cm |
| Hardest Boulder (Worked): | 9A |
| Hardest Boulder (Flash): | 8B+ |
| Hardest Sport (Worked): | 9a |
| Notable Partnerships | |
| Quinn Mason | |
28 recorded ascents.
| Climb | Grade | Style | Ascent Date | Suggested Grade | |
|---|---|---|---|---|---|
| Jungle Speed | 9a | Lead | worked | 2020 | ||
| Hunger | 9a | Lead | worked | 14th Sep 2022 | ||
|
On arriving at the crag Hamish worked the route for an afternoon then returned the next day and dispatched it on his fourth redpoint attempt of the day. A remarkably quick ascent! [1] References[1] https://www.ukclimbing.com/news/2022/09/hunger_9a_by_hamish_mcarthur-73151 [2] https://www.instagram.com/p/CiktsT8DZUZ/ |
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| A Muerte | 8c+ | Lead | worked | 2020 | ||
| Climb | Grade | Style | Ascent Date | Suggested Grade | |
|---|---|---|---|---|---|
| Megatron | 9A | Boulder | worked | 20th Apr 2025 | ||
| Second ascent. 5 sessions. | |||||
References[1] https://www.instagram.com/p/DI1VpYaILgJ/?img_index=1 [2] https://www.instagram.com/p/DI2IBrCykK9/ [3] https://www.climbing.com/news/first-repeat-worlds-hardest-boulder-megatron [4] https://www.youtube.com/watch?v=cXsdFEKL1Ag [5] https://www.ukclimbing.com/articles/trip_reports/gambling_on_confidence-16441 |
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| No One Mourns the Wicked | 9A | Boulder | worked | 4th May 2025 | 9A | |
| Second ascent. 1 session. | |||||
2 hours, 17 minutes from first trying Defying Gravity (8C) to doing the whole thing! References[1] https://www.instagram.com/p/DJRzZIzOOWv/?hl=en&img_index=1 [2] https://www.youtube.com/watch?v=r6lWVJrigTA [3] https://www.ukclimbing.com/articles/trip_reports/gambling_on_confidence-16441 |
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| Big Z | 8C+ | Boulder | worked | 19th Dec 2024 | ||
| 3 sessions. | |||||
References |
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| The Singularity | 8C | Boulder | worked | 2024 | ||
| Railway | 8C | Boulder | worked | May 2025 | 8B+ | |
|
Hamish used a new toehook method for the start, and suggested 8B+/V14 may be more appropriate for that method. He was also extremely close to flashing the problem, only making a minor dab on the last move. [2] References |
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| Defying Gravity | 8C | Boulder | worked | 4th May 2025 | ||
| 1 session. | |||||
|
In 30 minutes. |
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|
How Soon Is Now? Indoor |
8C | Boulder | worked | 24th Jun 2025 | ||
| First ascent. | |||||
|
Hamish had amazing grit to be able to send this boulder in one session. References |
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| Gran Paradiso | 8B+ | Boulder | worked | 1st Oct 2023 | 8B+/8C | |
References |
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| Sword in the Stone | 8B+ | Boulder | worked | 2024 | ||
| Second go. | |||||
| Fool Me Once | 8B+ | Boulder | flash | 2024 | ||
| Seven | 8B+ | Boulder | worked | 2024 | ||
| North Ridge | 8B+ | Boulder | worked | Sep 2024 | ||
References |
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| Backside Blowout | 8B+ | Boulder | worked | Nov 2024 | 8B+ | |
| First ascent. | |||||
| Little Women | 8B+ | Boulder | worked | 18th Feb 2025 | 8B+ | |
| 1 session. | |||||
| Tron | 8B+ | Boulder | worked | Apr 2025 | ||
| 1 session. | |||||
|
The World is NOT Enough (50°) Indoor |
8B+ | Boulder | worked | 1st Jan 2026 | ||
| Sixth ascent. | |||||
| 4X+1 | 8B | Boulder | worked | 1st Jan 2021 | ||
| Bulbhaul | 8B | Boulder | flash | Mar 2021 | ||
| Uncle Bombo | 8B | Boulder | worked | 10th Nov 2021 | ||
| First ascent. | |||||
References |
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| I Shot the Sheriff | 8B | Boulder | worked | 11th Sep 2024 | ||
References |
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| The Real Cherry Falls | 8B | Boulder | worked | Before 28th Dec 2025 | ||
References |
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| Sideshow | 8B | Boulder | worked | |||
| Tracky Lords | 8B | Boulder | worked | |||
| First ascent. | |||||
| Frontside | 8A+ | Boulder | flash | Nov 2024 | ||
| Chip Shop Buddy | 8A | Boulder | flash | 17th Oct 2021 | ||
| Climb | Grade | Style | Ascent Date | Suggested Grade |
|---|
| Climb | Grade | Style | Ascent Date | Suggested Grade | |
|---|---|---|---|---|---|
| How Soon Is Now? | 8C | Boulder | worked | 24th Jun 2025 | ||
| First ascent. | |||||
|
Hamish had amazing grit to be able to send this boulder in one session. References |
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| The World is NOT Enough (50°) | 8B+ | Boulder | worked | 1st Jan 2026 | ||
| Sixth ascent. | |||||