Action Medical Research are the leading UK charity funding vital research to help defeat the diseases that devastate the lives of sick and disabled babies, children and young people. At Action Medical Research we are determined to stop the suffering of babies and children caused by disease and disability. By supporting us, you are helping to find ways to reduce premature birth, to support children facing a lifetime of challenges caused by disabilities, and to develop cutting-edge therapies for rare and incurable diseases. Teams of four are taking part in this extremely tough dawn to dusk event where they will cycle 55 miles around the incredible winding lanes of the Brecons , navigate a 2-mile course on Lake Llangorse, and finally summit of Pen Y Fan, the highest mountain in the Brecon Beacons with an altitude of 886m, on an 8 mile round trip to raise money for this incredible cause. With your help, we're determined to make a real difference to children's lives.