Alvaro del Castaño, will participate for the first time in a marathon. Alvaro is an avid sportsman, but has never been a running fan. Riding on his different boards (windsurf, kite surf, snowboard, wake) or on his titanium bicycle, he has cruised many waves, slopes and mountains. He has now decided to change surface: Rotterdam's tarmac. He recently completed his first 10km run through the streets of Madrid, finishing completely exhausted but with a big smile in his face. Hooked-in to the sport now, and trained by former Spanish marathon record holder Rodrigo Gavela, he is determined to achieve three objectives by running this event. The first one is to raise as much money as possible for the foundation "Deporte y Desafio" among his friends and Goldman Sachs colleagues. "Deporte y Desafio" is a foundation aiming to achieve the social integration of handicapped people through the promotion of sports. Programs include ski (snow and water), sailing, diving, golf, cycling and horse riding. Alvaro's second objective is to finish the marathon without any injury. The last and more ambitious is to complete the event below 4 hours...and above all enjoy the challenge!