John Mutai is hoping to win his fourth Belfast marathon About 20,000 people are due to take part in events connected to the 30th Belfast Marathon which takes place on Monday.
Kenyan John Mutai is aiming to win the Belfast marathon for a fourth time.
He was beaten into second place last year as rival Urga Negewo of Ethiopia snatched a six-second win thanks to a sprint finish.
Traffic disruption is expected on a number of routes across the city.
The event begins at the City Hall at 0900 BST and finishes at Ormeau Park.
Organisers have said the majority of roads will remain open throughout the event, however the area around City Hall will be closed to traffic between 0715 BST and 0930 BST.
Disruption is expected in the city centre until 1100 BST.
Other roads affected include Victoria Street, Albertbridge Road, Holywood Road and Sydenham Bypass.
Bridge End, Hillview Road, Gideon’s Green and Corporation Street will be closed until 1400 BST.
Ormeau Embankment will be closed from 0700 BST until after 1800 BST.
This article is from the BBC News website. © British Broadcasting Corporation, The BBC is not responsible for the content of external internet sites.