More than 800 walkers took part in Macmillan's Cornwall Mighty Hike and raised over £390,000 for the cancer charity.
The event, which took place over the weekend of August 31, saw participants tackle a full or half marathon distance.
Helen Hancock, challenge events team manager at Macmillan Cancer Support, said: "Macmillan Cancer Support is incredibly grateful to the 848 people who took part in the breathtakingly beautiful, but physically challenging Cornwall Mighty Hike at the weekend.
"So far, they’ve raised an incredible £390,000.
"We couldn’t be more grateful for our amazing supporters."
The funds raised will help Macmillan provide crucial support for people living with cancer.
Ms Hancock added: "The thousands of people who are taking part in Macmillan Mighty Hikes this summer are part of something very special.
"Every penny raised at a Mighty Hike will help Macmillan to provide vital support for people living with cancer, when they need it most."
The funds raised could support Macmillan’s Cancer Information Nurse Specialists on the Macmillan Support Line phone service for one month, allowing them to handle more than 5,800 calls and web enquiries.
These specialists provide a wide range of information, including how to manage side effects, treatment options, living with cancer, and coping with grief.
The Mighty Hikes are a series of one-day half and full marathon fundraising hikes, held in some of the most beautiful parts of the UK.
Last year, 30,000 people walked more than 450,000 miles between them to raise £11.45 million as part of the Mighty Hikes series.
Ms Hancock concluded: "Our waiting list is open for the Cornwall Mighty Hike 2025 and there are still some places available at our remaining Macmillan Mighty Hikes this autumn, so sign up now at mightyhikes.macmillan.org.uk."
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