People taking part in this year's Streetathon will get the chance to run along a brand-new artery connecting East and West Kowloon before it officially opens.

The event, now in its tenth year, takes place on November 23 and features a city-centre marathon, a cross-harbour half-marathon and 10-kilometre races.

Full and half marathon runners will start on the Island Eastern Corridor in Causeway Bay, before crossing the Eastern Harbour Crossing to Kowloon, running through to Kai Tak and Kowloon Bay and traversing the entire Yau Ma Tei section of the Central Kowloon Route to finish at the Yau Ma Tei Interchange.

Andes Leung, CEO and co-founder of event organiser RunOurCity, said it will be a rare chance for runners to blaze along the brand-new bypass.

"This time we can close both eastbound and westbound of the whole bypass so that we can have more time for set-up and for dismantling, so we can have more interesting activities or entertainment inside the bypass," he said.

"Even though for next year or future years we may use the same bypass, it will not be the same because we cannot close both east and westbound together... so I would say this is the only unique time for runners to join this."

Leung said there will also be a separate 10-kilometre race for young entrants, to encourage full-time students aged between 12 and 25 to take up long-distance running.

Public registration for the races opened on June 12, with 20,000 places available in total.