"For some it's their third tour, for others it's their first."
A section of racing can be anywhere from 38km to 122km long through all kinds of terrain, most notably the rugged hill climbs like the Rimutuka Hills on the first stage to Featherstone, or the Kakatahi to Ohakune section with 7km of steady climbing.
Cain said as well as the trek itself, they had to take their bikes back to their accommodations and return to the start lines every time, which adds to the distance.
"I GPS'd it. It was 900km."
The draw card of being the last race has brought out the numbers as individual riders fit into A, B, and C categories, starting with the most serious athletes through to those who just want to challenge themselves to finish.
Last year's challenge only had 74 individual riders, whereas this year around 190 will be taking part, which with the corporate teams of various sizes takes the total entry list to around 280 in total.
The tour riders will arrive in Whanganui on Eastown Rd around 12.30pm on Tuesday, and departs for Kakatahi from the Velodrome at 8.30am on Wednesday.