A pilgrimage for those touched by cancer: cycling up one of South Wales' toughest climbs up to 15 times in one day. Have you got what it takes to tackle the Iron Mountain?

Some of my club-mates at CardiffAjaxCC participated in the event when this was filmed and I plan to take part this year on 4th May (see my blog: ianhomerphotography.co.uk/blog/2013/04/tumble-up/

If you'd like to donate to Cancer Research for my efforts please click on this link here: myprojects.cancerresearchuk.org/fundraise/fundraising-pages/tumbleup4life-2014

Update: I managed 9 ascents (& safe descents) last year. Easily one of the hardest days in the saddle I've ever had racking up 40 miles going uphill gaining roughly 4200m. Chapeau to the club-mate Lawrence who managed 15 - you have to go up once every hour to do that! I am shooting for the 15 this time!!

[ Filmed with a helmet mounted GoPro HD Hero from the bike (except passing shot)and interspersed with stills from a Nikon DSLR with 80-200mm f2.8. ]

Music:

"Chasing Time" by Dexter Britain (dexterbritain.co.uk)

"Collapsing Time" by Dexter Britain (dexterbritain.co.uk)

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