Triathletes prepare for an early morning swim in Kailua Bay, Wednesday, Oct. 5, 2011, in Kailua-Kona, Hawaii. The Ironman World Championship is scheduled for Saturday.

Triathletes swim through a south swell during an early morning swim in Kailua Bay, Wednesday, Oct. 5, 2011, in Kailua-Kona, Hawaii.

A cyclist is dwarfed by a large lava tube as he bicycles along the Queen Ka'ahumanu Highway on Wednesday, Oct. 5, 2011, north of Kailua-Kona,