I get regular google alerts about duathlon happenings. I'd say 60% of them come from New Zealand. Maybe it's just because it's now summer there, but the kiwis seem to be nuts over duathlon. A quick search for "New Zealand Duathlon" yielded this result: The Real Women's Duathlon. "Another 600 women catch the 'duathlon bug.'"

If you look at google trends for duathlon, you'll see that New Zealand has a much larger search volume than anywhere else in the world. Sadly, the US isn't even in the top ten.

So what is New Zealand doing right in promoting the sport of duathlon?