A sponsored walk from Priddy to Cheddar Gorge in the Mendip Hills by staff from EY's Bristol office raised more than £2,800 for Cancer Research UK.
It is part of the firm's total of more than £19,000 raised for the charity through fundraising activities in and out of the office.
Cancer Research UK was selected as the Bristol office's 2023/24 charity as part of EY's UK Charitable Giving programme.
Fundraising is led by Mark Ireson, manager of EY in Bristol, with support from other members of the team.
He lost both his father and uncle to cancer in 2019, before his mother was diagnosed with the illness the same year.
Mr Ireson said: "I’ve been absolutely blown away by the support of colleagues in EY Bristol.
"The whole office got behind all the fundraising events we’ve organised, which is amazing.
"Cancer Research is a cause close to my heart and I’m so grateful for everyone’s support."
Louise Gash, Cancer Research UK, added: "It has been fantastic supporting the EY Bristol office to raise vital funds for Cancer Research UK.
"The whole office has really embraced the challenge and the amount raised has far exceeded what we thought would be possible."
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