Should Sydney's new 80-kilometre Bondi to Manly walk be called the Manly to Bondi track?

The answer depends on your perspective, and which of six mayors you asked at Sunday's launch to mark the signing of a memorandum of understanding that will make the new walk a reality.

The trail is a dream come true for two night walkers – former Labor senator John Faulkner and Kevin Rudd's former senior press secretary and chief executive of media company RevTech, Lachlan Harris.

Walking at night, the only time Mr Faulkner and Mr Harris could escape the stresses of the government, they realised there was more public land around the harbour than anyone realised.