The current edition of this event is on 15 July 2018.
The third and final day of 3 Marathons in 3 Days in 2014 is on Sunday, 13 July and includes the Cairns Marathon.
The event is a 3-day stage race totalling 126.6 kms. Competitors who want to do only one marathon, can enter the Cairns Marathon, which is the same course, date and time as the third marathon of the 3 Marathons in 3 Days.
Race Founder, Larry Lawson, claims that this ultra marathon came about "by accident", as there was a "Marathon in Three Days" on the race calendar, but Larry said "I'll do Three Marathons in Three Days", and soon he had enlisted other Club Members to join him. Beyond this, it seems to have taken on a life of its own, with a lot of excitement about the event.