It is now so big that 600 riders pre-registered for this year's May event, but numbers are capped at 250.
"Some are cancer patients themselves. We have had nurses come with us on the day as people going through chemo want to do it."
Mrs Rattray, a graphic artist and marketing consultant, and mother to two children, aged 7 and 8, looks after the promotion and registration while her husband oversees safety and traffic management.
They were nominated for Fundraiser of the Year by two-time entrant Anthea Terris.
Voting is now open for the TSB Bank People's Choice Award. The Herald will profiling each of the 24 national finalists. Voting closes 11.59pm on September 7, with the awards to take place on September 10. Decide who you think is the most deserving. You are only able to vote once, so choose wisely. You can register your vote here.
* For more awards information, visit: prideofnzawards.co.nz.