The marathon will start in Napier and finish at Sileni Estates Winery outside Hastings, covering a "hybrid course" of roads and off-road trails, which Lagardere believed would appeal to runners.
"The investment this region has put into its bike trails provides a great platform for running events as well because they make a fantastic running surface. They're a bit easier on the knees for the older people," Mr Beeche said.
"With the course we've created, we've managed to highlight most of the fantastic assets of this region."
A new Queenstown marathon run by the company for the first time last year attracted almost 6000 runners, with 90 per cent of them from outside the region.
Lagardere's "best guess" was that the Hawke's Bay run would attract 2000 or more runners in its first year. "We want this to get big," Mr Beeche said.
Air New Zealand regional affairs manager, Ian Collier, said the airline's support for the event was a "no-brainer" as it increased seat capacity into Hawke's Bay by 5.5 per cent over the next 12 months, through the transition to flying in more larger 68-seat aircraft.
Air NZ added 3500 seats into Queenstown for its marathon weekend last year.
Hawke's Bay Tourism general manager Annie Dundas said the marathon would be marketed under the "Hawke's Bay banner".
"So we won't have a logo fest - that's good, we want people to know about getting to Hawke's Bay. With this event they are going to see a lot of it," she said.
"It's our regional events strategy in action."