Hayward was 17th in his age group and 38th overall, while Cain was in 75th position overall and 7th in her age group.
Hayward's life partner Nicky Plane said he was well ahead of where he was at the same stage last year and feeling comfortable, although he did sleep in yesterday morning and was forced to scramble to make the early morning start.
The top female Georgie Chadwick (30-39) from Wellington was some 15 minutes ahead of her nearest rival and was sitting in 6th place overall before leaving yesterday.
Organiser Stephen Cox said the challenge had run relatively smoothly since leaving Lower Hutt on Sunday with no serious incidents or injuries to report from the 80 or more individual riders or the corporate teams made up of another 80 riders. The leading corporate team was the sponsor's BDO No1 team.
The challenge ends in Pukekohe on Saturday.