A man from is near completing his challenge of walking up South Wales' highest peak 365 times - in 365 days.
Des Lally has raised more than £40,000 for charity.
The worst I've seen is probably 70-80mph winds, snow and really low visibility.
Des said it has been physically demanding on his knees and ankles but said the thought of others suffering has spurred him on.
I'm only doing it for a couple of hours a day and people who have suffered injuries through the armed forces or have got cancer or who have had cancer - it's nothing compared to what they go through.
He's walked nearly 400,000 steps and passed thousands of people during his walks - but one in particular stands out.
"We passed Geraint Thomas on the path. We thought he's probably come up here for a bit of peace and quiet after the Tour de France so we just walked past him and just gave him his quiet time."