On 23rd May my mate Ian is insanely riding a bike from London to Chamonix in the French Alps - a distance of some 600 miles (with a sharply rising gradient!) . This is to raise money for a cancer care charity http://www.ucare-oxford.org.uk/, which Ian recently had cause to visit.
Now I'm sure he won't mind me saying that he wasn't exactly built for spending days in the saddle so this is an incredibly ambitious objective. However I note that with an intensive training regime he is already a leaner version of himself and I am certain he can do this in the 6 days he has targeted.
If you want to learn more and support Ian's endeavours, here are the relevant links: