Huge Road Closures For City2Surf Run: What You Need To Know

Sydneysiders will face widespread road closures across the city and eastern suburbs as more than 84,000 people gear up for a sell-out City2Surf.

The 49th annual event will start just before 8am on Sunday and run from Hyde Park in Sydney's CBD to Bondi Beach.

More than 84,000 people have registered for the event, which has sold out for the first time in seven years.

Motorists and residents are being reminded of major road closures and special event clearways around the route.

Some of the 80,000 participants in the annual City2surf fun run in 2018. Photo: AAP

Roads around the start line will close from 3:30am with all closures along the 14km course to be in place by 7am.

These will include New South Head Rd, Old South Head Rd, Military Rd and Campbell Parade.

Special event clearways will also be in place along the entire fun-run route between 1am and 4pm.

Roads in the city will start to reopen from 11:30am while roads in the eastern suburbs will start to reopen from 1pm.

Roads at Bondi Beach will remain closed until 4pm.

Participants running down William street in 2018. Photo: AAP

Police will be running a high-visibility operation to ensure the safety and security of those involved.

"City2Surf is a much-celebrated Sydney event and we intend to maintain that atmosphere," Superintendent John Duncan said in a statement.

"Our priority is making sure the route and surrounding areas are safe for the tens of thousands of runners taking the 14km challenge this year."

Runners in 2017. Photo: AAP

Officers will also be patrolling the finish line area in Bondi to reduce the risk of anti-social behaviour and alcohol-related crime, Supt Duncan said.

Additional public transport services will be running before and after the race.

Participants and volunteers are entitled to return travel on some public transport including across trains, Sydney Metro, special event shuttle buses, regular buses, ferries and light rail services.