Any people-powered vehicles, such as bikes, ebikes, scooters and skates, can be used for the race.
Entrants then record how many laps they did of their chosen route, and send the entry form into Velo Ronny's or any of the tour's sponsors.
Started in 2019, Cath Cheatley is the main organiser behind the event.
Husband Dayle Cheatley said every year more and more people had been signing up.
"It has been fantastic. It has grown and grown and grown and this year it will be even bigger. You can see that with just the amount of people out riding their bikes.
"It is great to make use of all the bike paths around the river and a good opportunity to get out there and be active."
Cheatley said the support from local businesses and sponsors had been amazing, offering up prizes for competing locals.
The top prize this year is a bike worth up to $700.
More info can be found at https://veloronnys.co.nz