ITV News Correspondent Martha Fairlie tells the story of David, Jimbo and their climb to the top
Each of us has our own personal Everest for David Adams, who's blind and nearly 78, it's a hill in Warwickshire.
He and Jimbo, his guide dog, have climbed Marston Hill so many times they'll have reached the equivalent of the Himalayan peak this weekend.
They've scaled the steep slope in Priors Marston, alongside sherpa Charlotte Paynter, almost 200 times.
It's the first time a guide dog has climbed the equivalent of the height of Everest.
And it's all for good causes.
David is hoping to raise one million pounds for three charities - a target started by his son Simon who died of motor neurone disease 10 years ago.