This year more than 110,000 athletes vied for a slot to the Ironman World Championship, and 2,350 athletes earned the right to race in Kona.

2017 Ironman World Championship Age Groupers
2017 Ironman World Championship Age Groupers
2017 Ironman World Championship Age Groupers
Photo: Paul Phillips/Competitive Image
2017 Ironman World Championship Age Groupers
2017 Ironman World Championship Age Groupers
2017 Ironman World Championship Age Groupers
2017 Ironman World Championship Age Groupers
2017 Ironman World Championship Age Groupers
2017 Ironman World Championship Age Groupers
2017 Ironman World Championship Age Groupers
2017 Ironman World Championship Age Groupers
Canada’s Alexandre Boule on the bike. Photo: Paul Phillips/Competitive Image
2017 Ironman World Championship Age Groupers
Germany’s Dirk Niederau. Photo: Paul Phillips/Competitive Image
2017 Ironman World Championship Age Groupers
Australia’s Ian Lack. Photo: Paul Phillips/Competitive Image
2017 Ironman World Championship Age Groupers
Canada’s Carl Desruisseaux. Photo: Paul Phillips/Competitive Image
2017 Ironman World Championship Age Groupers
Germany’s Jan Selnes. Photo: Paul Phillips/Competitive Image
2017 Ironman World Championship Age Groupers
A group of athletes make their way down the Queen K. Photo: Paul Phillips/Competitive Image
2017 Ironman World Championship Age Groupers
Team Hoyt. Photo: Paul Phillips/Competitive Image
2017 Ironman World Championship Age Groupers
Team Hoyt. Photo: Paul Phillips/Competitive Image
2017 Ironman World Championship Age Groupers
Athletes march through the Energy Lab, the toughest part of the marathon course. Photo: Paul Phillips/Competitive Image
2017 Ironman World Championship Age Groupers
An athlete runs through the Energy Lab. Photo: Paul Phillips/Competitive Image
2017 Ironman World Championship Age Groupers
That’s one way to cool down! Photo: Paul Phillips/Competitive Image
2017 Ironman World Championship Age Groupers
The volunteers are a huge part of the race. Photo: Paul Phillips/Competitive Image
2017 Ironman World Championship Age Groupers
Athletes run in and out of the Energy Lab. Photo: Paul Phillips/Competitive Image
2017 Ironman World Championship Age Groupers
A busy time on the Queen K. Photo: Paul Phillips/Competitive Image
2017 Ironman World Championship Age Groupers
South Africa’s Helen Susannah Webb was the first visually impaired female athlete to complete Ironman South Africa. Photo: Paul Phillips/Competitive Image
2017 Ironman World Championship Age Groupers
American Ellen Hart on the run. Photo: Paul Phillips/Competitive Image
2017 Ironman World Championship Age Groupers
Athletes on the Hoka One One run course. Photo: Paul Phillips/Competitive Image
2017 Ironman World Championship Age Groupers
Athletes get much needed hydration and nutrition at an aid station at the 2017 Ironman World Championship. Photo: Paul Phillips/Competitive Image
2017 Ironman World Championship Age Groupers
Athletes do anything and everything to stay cool on the blazing marathon course. Photo: Paul Phillips/Competitive Image
2017 Ironman World Championship Age Groupers
The Energy Lab remains busy as the suns start to set on race day. Photo: Paul Phillips/Competitive Image
2017 Ironman World Championship Age Groupers
Poland’s Wojtek Szeliga on his way to a 11:43:04 finish. Photo: Paul Phillips/Competitive Image
2017 Ironman World Championship Age Groupers
After the Energy Lab athletes are in the homestretch of the marathon. Photo: Paul Phillips/Competitive Image
2017 Ironman World Championship Age Groupers
Even though the sun sets on racing, there are still about six hours to go. Photo: Paul Phillips/Competitive Image

This year more than 110,000 athletes vied for a slot to the Ironman World Championship, and 2,350 athletes earned the right to race in Kona. Here photographer Paul Phillips shares images from the epic day of racing on Oct. 14.

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