Ironman Kona Swim/Bike/Run Splits 2002-2010

When you race in Kona, odds are good that you'll face the legendary headwinds in the lava fields for at least the last 30 miles of your bike ride, if not more. When the winds are howling at 40 to 50 mph gusts, almost lifting riders off the road, that's Kona at its most devious. Some years, the headwinds are intense; other years, a tailwind helps you sail on the Queen K Highway.


The winds were at top force in 2004, and the difference in overall finish times is clear: a 6:22 bike split was the defining factor in the only race in Kona since 2002 that had an average finish time over 12 hours. Not surprisingly, 2004 saw a remarkable 9% DNF rate as well. Yet, the next year featured most enjoyable tailwinds, leading to substantially faster times.  For more, see our Complete Ironman Kona Coverage.

Ironman Kona: Entrants, Starters, Finishers: DNS and DNF Analysis

Most triathletes spend years of dedicated training to take their performance to the highest levels to earn the chance to qualify for the Ironman Triathlon World Championship in Kailua-Kona, Hawaii. The number of registered entrants -- more than 1500 who qualified, 205 lottery slots, former winners and select others -- has topped 1900 in 2010 for the first time ever. However, getting to the finish line on Alii Drive is far from guaranteed.


It's not uncommon for 10% of entrants, or more, to not start or not finish Ironman Kona, in any given year. Up to 5% of registered entrants may not present to start the race. Another 5% or so will start but not finish, and the DNF rate has ranged as high as 9% in 2004 and as low as 3% a year later, in 2005. Yes, Kona can be brutal one year, and, well, less brutal another. See our Kona 2002 to 2010 Swim/Bike/Run/Finish Times Analysis for examples. For more, see our complete Ironman Kona Hawaii Coverage.