The Raleigh Challenge – Wilson Trail has been cancelled owing to safety concerns as Hong Kong continues to be gripped by anti-government protests. The race has four distances – 83km, 160km, 30km, 53km – some of which were available as a relay, and was supposed to take place on Saturday and Sunday.

The Wilson Trail begins on the south side of Hong Kong and snakes its way north to the mainland border. It passes through a variety of environments, and comes close to urban districts such as Quarry Bay, which have seen protests in recent months.

“We understand the concern on whether the event could be held in this weekend under a safe environment,” the race organisers posted on Facebook. “We have closely monitored the traffic conditions of our racing regions and assessed their impacts on our event. As of now, due to the prevailing uncertainties, cancellation has become a difficult but necessary decision for the sake of the safety of our participants and volunteers.”

Protests that began in June in opposition to a controversial extradition bill that would have seen fugitives sent back to mainland China, has spiralled into nearly weekly violent clashes between protesters and police.

“We will inform all runners of the post-cancellation arrangements soon” the organisers said. “Thanks once again for the unfailing support of our volunteers, participants, sponsors and supporting organisations to Raleigh Hong Kong.”