Conceived in the mind of a child growing up in the foothills of Snowdonia, the concept is simple but the reality is strangely rewarding…  To travel from actual sea level to the summit of Cader Idris by human power alone.

In 2017, the Cancer charity BLOODWISE, will be hosting this epic event.  There will be two route options this year, comprising of The Caderman Sprint distance or the all new Caderman Extreme 70.3 route.

Croeso i Caderman…. Welcome to Caderman!


The sea swim takes place in Tywyn, where the surf is usually kicked up by strong winds, whipping across the Irish sea. Even during August a wetsuit is mandatory! The promenade is in view through-out the swim section and provides an ideal view point for supporters. A bucket and spade is optional.  The swim route is a 600m sea swim for the Caderman Sprint distance but those brave enough to tackle Caderman Extreme will be swimming the standard 1,900m.  You will exit via the beach and enter T1 after a short sandy sprint.


The second stage is the cycle route from Tywyn to Dolgellau. The distance is only 22 miles (35.5km) on the Caderman Sprint route and yet you will take on 3 stunning climbs along the way. The scenery can only be described by one word…. Spectacular! As you leave the costal town behind you, the southern range of Eryri mountains are looming ahead. The route takes you past glacial lakes, over cavernous valleys and through the old market town of Dolgellau. Beware the sting in the tale that sees you climb to the foot of Cader Idris.  For those on the Caderman Extreme 70.3 route, you’ll be treated to a bonus climb that takes you through the historic slate mining village of Corris, before decending back to sea level, via Pennal and Aberdyfi.  You will rejoin the Caderman sprint cycle route at Bryncrug and head on up the valley to complete your 56 mile (90km) ride.

From this point on, there’s only one way to go… UP!


T2 sits at the foot of Cader Idris, and for those on the Caderman sprint route, its merely a 5k run up the brutal climb of one of Snowdonia’s finest mountains.  The gradient is unrelenting as you tackle the Ty Nant route to the summit of Cader Idris at 896m.  If you’ve opted for the Caderman Extreme 70.3 route, you’ve got a treat in store!  Having cycled yourself to within touching distance of the mountain, you’ll begin your half marathon to the summit by running back to sea level, via the beautiful Gwynant Valley.  You’ll descend and join the award winning Mawddach trail as you run your way back to Dolgellau and leave the Mawddach river behind you, to climb once again to the foot of the Ty Nant Pony Path trail.  The final 5km is an un-relenting ascent of Cader Idris.

To touch the summit trig point and glimpse at the start line all those miles away at sea level, is an amazing feeling…  Only then will you be a Caderman!

Secure Online entry is available HERE via the BLOODWISE website.  Limited spaces available so book your place now!

In previous years the 3 hour mark was well and truly smashed with the Sprint Distance record standing at 2:04:13 but will the sub 2 hour line ever be crossed?…and in 2017, who will be the very first Caderman Extreme 70.3 winner?

If you would like more information, please contact us via our Facebook page.  Like and share the page for the latest updates, or drop us a message if you’d like more details.

Route mapping and ascent charts are available here