As a New Year's resolution it was a little extreme. At the start of 2013, Melbourne couple Janette Murray-Wakelin, 64, and Alan Murray, 68, set out to run around Australia for a year, completing a marathon a day.

That's 365 marathons, or more than 15,000 kilometres. With no day off.

About 3pm on Tuesday, barring a catastrophe, they will achieve their goal, jogging triumphantly up St Kilda Road to their starting point, Federation Square.

Oh, and on Wednesday, New Year's Day, from 5am, they will run one more marathon – 44 kilometres home to Warrandyte along the Yarra Trail to set a new world record for the most consecutive marathons.