Australia’s most famous piece of tourist tarmac will be swamped with more than 5,000 runners on Saturday morning.

The ninth Great Ocean Road Marathon will test the competitors’ mettle as they take on the rolling roadway between Lorne and Apollo Bay.

Around 5,000 people are registered for event with 1,150 taking on the marathon course and 2,670 tackling the half marathon.

Keep an eye out for four-time Olympian Craig Mottram and marathon legend Steve Moneghetti, who will be competing in the 14km event due to a recent injury.

Event Director John Craven described the Victorian marathon as the world’s most spiritual event.

“Most other great marathons around the world are run among buildings and skyscrapers such as Boston, London and Tokyo, but here, competitors are surrounded by the beauty of the Great Ocean Road landscape, so we are hoping for clear skies,” he said.

During the event, which also encompasses 6km, 14km wheelchair and kids’ gallop disciplines, the Great Ocean Road will be closed to vehicles.