The Powys leg of a walk across Britain has been hailed as the most beautiful by a fundraiser taking on a 900-mile challenge.

Harriet Thomas, 61, is walking from Land's End to John O'Groats to raise £25,000 for Dementia Adventure, a charity close to her heart.

She said her hike along Offa's Dyke from Chepstow to Knighton was the most magical part of her journey so far.

Her trek has been full of breathtaking views, with those from Hegest Ridge leaving a lasting impression.

Ms Thomas said: "I've walked 865 miles so far and raised over £15,000 to date, and it's been a blast.

"But being 426 metres up Hegest Ridge in beautiful rough grasslands with a coppice of rowan berries and views of lush hilly landscape with fields bound by hedgerows was truly magical.

"I met the friendliest people too in places like Knighton, I'd love to come back to explore more."

Tony Christie met with Harriet Thomas in Lichfield on August 29  (Image: Supplied)

She is also being supported by some famous faces, including singing legend Tony Christie and Emmerdale actress Sian Reeves.

The Proclaimers, Charlie and Craig Reid, also sent her a video message.

The mum-of-two was inspired to raise the money for Dementia Adventure after her mum Susan Thomas lived with dementia for nine years.

She said: "I'm 61 years old now and believe you're never too old to have an adventure.

"When Mum died, I was untethered for a while, so I decided to explore the world on foot, starting in the UK.

"Every step of this walk is meaningful as it represents the 900,000 people in the UK living with dementia.

"When she had dementia, Mum was calmer in nature.

"It's a sensory place.

"The temperature of the air, the breeze in her hair and on her face, the scents, the colour of flowers all seemed to light her up.

"She may have said nothing all day but when we were smelling a rosemary plant or listening to a bird, she would say 'lovely' or 'beautiful'.

"It was as if nature touched the deepest part of her that dementia couldn't reach, and I'm walking for Dementia Adventure so other families might get the chance to have similar experiences."

Ms Thomas' journey is being documented in a podcast called 'The D Tour', which is currently in the top 25 per cent of downloaded podcasts in the UK.

Money raised by Ms Thomas will be added to the Dementia Adventure Support Fund, which provides life-enhancing supported breaks for people living with dementia and their carers.

The charity offers respite, connection, and hope, allowing families to find peace, joy, and purpose through nature and outdoor adventures together.

Fiona Petit, CEO of Dementia Adventure, said: "Harriet's journey embodies the spirit of Dementia Adventure—resilience, community, and the transformative power of nature.

"We encourage everyone to support Harriet, listen to the podcast, and join us in making a real difference."

Estimates suggest that 982,000 people live with dementia in the UK, a number expected to rise to 1.4 million by 2040.

For every mile Ms Thomas walks, she represents 1,000 people with dementia, each with unique lives and stories.

For more information and to follow Ms Thomas' progress, visit dementiaadventure.org/dtour.