Dunedin's Glen Sutton (41) went home to sit on his couch with his feet up.
''I've been trying to [relax], but I have three kids, who are quite noisy,'' he said after his around the clock effort.
Mr Sutton started running laps of the 1.65km long Andersons Bay inlet circuit at 10am on Saturday, to train and raise funds to compete in the Badwater 135 foot race in California next month.
When he finished at 10am yesterday, Mr Sutton had run 127 laps, or slightly more than 209km.
He stopped seven times to relieve himself, and ''that was about it''.
There was one streaker who jumped out in front of him, which delayed the run momentarily, he said.
For him, the most important thing was ''spending 24 hours on my feet''.
He was pleased the run went off without a hitch, with ''no niggles, no injuries''.
Bruce Adams and two others travelled around the inlet with Mr Sutton as his support crew. Mr Adams called the Badwater ''the world's hardest foot race''.
Mr Sutton finished it in 36 hours last year.
''He's a pretty class act,'' Mr Adams said.
Only 100 runners from around the world were selected for the competition, he said.
''You don't just rock up and say 'Yes, I want to do it'.''
Mr Sutton was the only New Zealander selected to compete this year.
The area in which the race is held recorded the world's hottest air temperature - 57degC - in 1913.
Competitors run on white lines painted on the road so the soles of their shoes do not melt.
About 40 Caversham Harriers members ran at times with Mr Sutton as support during the weekend's 24 hour marathon, Mr Watkins said.
''At every lap, between one and 50 odd people ... showed up,'' Mr Sutton said.
''It was very humbling ... I'm very lucky.''
