Somewhat overshadowed by the World Champs, the other Ironman race of the weekend was Ironman Louisville. It’s a large race with over 2,300 competitors and the standard 40 Kona slots for the 2019 Ironman World championship on offer. Conditions on race day resulted in a drastically shortened swim and were cold and wet enough to cause a higher than usual DNF rate.
With such a shortened swim we can’t make any reasonable comparison with previous years for swim or overall times. We can make some comparison of bike and run though. Here we see much slower bike splits, presumably influenced by the cold, wet conditions. The run trends slightly faster – the conditions having less impact and the field thinned of many competitors by that stage. The huge chunk of time saved on the short swim means overall times will all come in much faster.
The cold and wet conditions pushed the DNF rates up at this year’s race. I should first note that prior to 2015 the Ironman results sets often made it hard to distinguish a DNS from a swim DNF so those numbers may be artificially high by incorporating DNS too. If you compare with the last 3 years though the DNF rate is more than double the usual level with a large 11% dropping out on the bike. This isn’t the most extreme DNF rate seen at Ironman, but we don’t normally see numbers like this without unusual circumstances.
We can again make a cursory comparison of bike and run and see that they tend to follow the trends shown in the distributions. Slower bike medians and generally faster run medians.
This is predominantly a North American race with a scattering of other nationalities in the mix. Overall the slots stay in the US, but a good proportion go elsewhere.
The charts of age group times by position for Louisville are some of the most variable I’ve seen. this race has seen a lot of fluctuation in performances over the years. Again, this year will stick out thanks to the shortened swim.
Based on the start numbers I’ve estimated the Kona slot allocation (as mentioned in previous analysis the final numbers may vary as my current method is not an exact match) and from that the qualification times before taking roll downs into account. You can compare this with other races on my Kona qualification page.
Finally the age group top tenets times which are naturally much faster than the averages for almost every age group. This can all be explained by the shortened swim. The youngest age groups don’t appear to have faired as well in the cold with F18-24 being slower than average and M18-24 closer than most.
You can access a spreadsheet of the full results from Ironman Louisville 2018 on my Google Drive.