"This sport has given me so much. Today was the performance that I've been dreaming of.''
It was not such a good day for 10-time Ironman New Zealand champion Cameron Brown who was forced to withdraw on the run after being well back throughout.
Three-time winner Chrissie Wellington of Great Britain made it four in the women's race in a superb 8:55.08 which was just a minute outside her own race record. She withstood a blistering marathon run record by defending champion Mirinda Carfrae to win by just under three minutes.
Carfrae, the Australian who finished runner-up at Ironman New Zealand this year, ran 2:52.41 to break her own marathon run record at the race with her training partner Leanda Cave of Great Britain, both coached by Siri Lindley, finishing third.
Wellington was pushed to the limit today and paid tribute to her rival Carfrae.
"My victory is also hers,'' said Wellington. "This race means more to me than anything. It's the sweetest victory - I just proved that anything is possible. There were times that my body was going to give up on me. I think the hardest victories are definitely the sweetest. To be crowned the Ford Ironman World Champion is the greatest honour.''
The leading New Zealander was Samantha Warriner, who finished in 17th place in her Ironman debut in 9:43.25. Warriner had a solid swim in 58:44, worked her way into the top eight at one stage on the bike in 5:04.09 but suffered, as so many do in the heat first time at Hawaii, with a 3:31.38 marathon.
Six-time Ironman New Zealand champion Jo Lawn, who had prepared for last month's ironman 70.3 (Half) world championship where she was fifth, had a tough day in 19th place.
Results,
Elite men: Craig Alexander (AUS) 8:03.56, 1 (race record); Pete Jacobs (AUS) 8:09.11, 2; Andreas Raelert (GER) 8:11.07, 3; Dirk Bockel (LUX) 8:12.58, 4; Timo Bracht (GER) 8:20.12, 5. Also: Cameron Brown (NZL) dnf.
Women: Chrissie Wellington (GBR) 8:55.08, 1; Mirinda Carfrae (AUS) 8:57.57, 2; Leanda Cave (GBR) 9:03.29, 3; Rachel Joyce (GBR) 9:06.57, 4; Caroline Steffen (SUI) 9:07.32, 5. Also New Zealanders: Samantha Warriner 9:43.25, 17; Jo Lawn 9:56.15, 19.