Dave Beeche, managing director of The IRONMAN Group Oceania, organisers of the City2Surf, said despite the disruption of COVID-19 interest was strong for the virtual version of the race.
“We’re thrilled to have people taking part from more than 20 countries, showing that this event is important to people across the world,” Mr Beeche said.
In Sydney, registrations were highest in the suburbs surrounding Strathfield, followed by the southern part of the eastern suburbs including Randwick and Maroubra.
The third most popular area for virtual City2Surf runners was North Sydney and Mosman, followed by Parramatta, then Ryde and Hunters Hill in fifth place.
Rounding out the top 10 were the northern part of the eastern suburbs, Blacktown, Newcastle, Ku-ring-gai and Warringah.
Transport for NSW has warned motorists that areas around popular running tracks may be busier than usual on Sunday. It also urged runners against running on the road where a footpath is available, or darting in front of vehicles when crossing roads.
The virtual event is still a major fundraiser for charity, with more than $500,000 donated so far this year.
Entry is $39 for adults, with a donation of $5 from each adult entry going to select City2Surf charity partners, and $20 for children.
All participants receive a 50th anniversary finishers’ medal and a branded Virtual Run Bandana athlete gift.