1 of 17 photos
At 7:30am the start gun went off for the professional women and the atmosphere was electric.
2 of 17 photos
Atlanta, GA native Haley Chura took the early led on the bike but was beaten out of the water by Lauren Brandon.
3 of 17 photos
It did not take very long however for Daniela Ryf to go to the front. Ryf looked very calm, while her competitors looked like they had to work much harder.
4 of 17 photos
Annabel Luxford rode several sections of that climb in the aero position, and she was near the front of the action. Luxford finished 6th.
5 of 17 photos
German Laura Philipp came into the race with the number 3 bib and had to chase hard after a swim that saw her with a large gap to the leaders.
6 of 17 photos
Brit Emma Pallant also had to ride hard to catch the front pack.
7 of 17 photos
Daniela Ryf pulled away further and further and was flying down the descent. A nearby speed trap clocked her at 42 miles an hour on that gentle down slope.
8 of 17 photos
It was on that descent off Lookout Mountain where defending champion Holly Lawrence pulled out. She had chased hard to be in the mix and then felt that she simply did not have "the right legs."
9 of 17 photos
Lauren Brandon was first out of the water but struggled on this day.
10 of 17 photos
Many eyes were on Sarah True (Groff) as she was somewhat of a wild card. She was solid on the bike and during the run she chased down Helle Frederiksen for fourth place.
11 of 17 photos
Meanwhile up front Daniela Ryf pulled further and further away.
12 of 17 photos
Alicia Kaye looked fine during the bike segment but struggled during the run.
13 of 17 photos
A very solid run gave Daniela Ryf her third IRONMAN 70.3 World Championship title in 4:11:59.
14 of 17 photos
Laura Philipp ran 1:21:17 and that gave her the final podium spot in 4:19:40. Emma Pallant with a race best run of 1:19:52 finished second in 4:18:36.
15 of 17 photos
Sarah True fully focused on the way to fourth place.
16 of 17 photos
In the end it was 7th place for Heather Wurtele.
17 of 17 photos
There was plenty of entertainment for pros and age groupers alike on the run course in Chattanooga.