- 3 Marathons in 3 Days (3M3D) (126.6km), 7-9 July 2017. In its sixth year. 42.2km run over three consecutive days. Each marathon stands alone and you can enter 1, 2 or 3 during the registration process. The cost is the same, regardless of how many marathons you choose to enter. After each marathon you receive a medal and age category ribbon (if applicable). If you choose to do all three marathons, you also receive the coveted 3 Marathons in 3 Days medal!