| From | USA 🇺🇸 |
| Date of birth | 16th Sep 1997 |
| Age | 28 years old |
| Gender | Female |
| Height | 165 cm |
| Climbing | |
| Hardest Boulder (Worked) | 8C+ |
| Hardest Boulder (Flash) | 8A |
| World Cups | |
| Appearances | 1 |
| Notable Partnerships | |
| Keenan Takahashi | |
| Aidan Roberts | |
| Family | |
| Andy Lamb (sibling) | |
Katie Lamb is an American boulderer, currently based in the Yosemite area. She was the first woman to climb 8C+ with her ascent of The Dark Side (8C+) in 2025. She had previously climbed Box Therapy in 2023 which was regarded as 8C+ at the time, though now rated 8C.
Lamb was a successful youth lead comp climber, winning the PanAmerican Youth Championships. She went on to study computer science at Stanford University, which left less time for climbing. After graduating, she turned her focus to outdoor bouldering, steadily working through an enviable ticklist of hard problems.
Her ascent of The Dark Side (8C+) was the culmination of 20–25 sessions:
It’s easy to fall into the trap of treating friction on this boulder like passive resistance - a force that each scaler is at the whim of. But I learned to reshape this narrative: friction is something to sit with, to actively attend to, and to ask for help in understanding.
In 2026 she made the first ascent of 130 BPM (8C) in Yosemite, one of the hardest problems in the Valley.
Her older brother Andy Lamb is also a notable boulderer.
[1] Interview with Katie Lamb, Climbing.com https://www.climbing.com/people/katie-lamb-interview/
[2] Katie Lamb's 8C+ Ascent of The Dark Side, YouTube https://www.youtube.com/watch?v=STfiakiPNCY
[3] Interview with Sam MacIlwaine (2025) https://www.climbing.com/culture-climbing/golden-piton-2025-katie-lamb/
| From | USA 🇺🇸 |
| Date of birth | 16th Sep 1997 |
| Age | 28 years old |
| Gender | Female |
| Height | 165 cm |
| Climbing | |
| Hardest Boulder (Worked) | 8C+ |
| Hardest Boulder (Flash) | 8A |
| World Cups | |
| Appearances | 1 |
| Notable Partnerships | |
| Keenan Takahashi | |
| Aidan Roberts | |
| Family | |
| Andy Lamb (sibling) | |
Katie Lamb is an American boulderer, currently based in the Yosemite area. She was the first woman to climb 8C+ with her ascent of The Dark Side (8C+) in 2025. She had previously climbed Box Therapy in 2023 which was regarded as 8C+ at the time, though now rated 8C.
Lamb was a successful youth lead comp climber, winning the PanAmerican Youth Championships. She went on to study computer science at Stanford University, which left less time for climbing. After graduating, she turned her focus to outdoor bouldering, steadily working through an enviable ticklist of hard problems.
Her ascent of The Dark Side (8C+) was the culmination of 20–25 sessions:
It’s easy to fall into the trap of treating friction on this boulder like passive resistance - a force that each scaler is at the whim of. But I learned to reshape this narrative: friction is something to sit with, to actively attend to, and to ask for help in understanding.
In 2026 she made the first ascent of 130 BPM (8C) in Yosemite, one of the hardest problems in the Valley.
Her older brother Andy Lamb is also a notable boulderer.
[1] Interview with Katie Lamb, Climbing.com https://www.climbing.com/people/katie-lamb-interview/
[2] Katie Lamb's 8C+ Ascent of The Dark Side, YouTube https://www.youtube.com/watch?v=STfiakiPNCY
[3] Interview with Sam MacIlwaine (2025) https://www.climbing.com/culture-climbing/golden-piton-2025-katie-lamb/