The fourth edition of the Clark Ultramarathon, a premier ultra-marathon event in the Philippines, is set to take off between 8th and 9th September, 2018 at the Clark Freeport Zone. The event consists of 100 Kilometer Championship and 50 Kilometer Challenge categories. It also includes4-Men and 2-Men Relays for the 100K and 50K, respectively. Cardimax – Clark Ultra-marathon is an event powered by RaceYaya. The race provides an extraordinary race experience on the roads of Clark Freeport Zone, a tough but memorable race. Runners of various degrees of speed and ability are expected to gather in this journey to go longer, go faster, and go together.