If it’s Thursday in Kona, it’s the Underpants Run!

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Athletes strip down for underpants run at Ironman world championships - Canadian Running Magazine

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Athletes strip down for underpants run at Ironman world championships - Canadian Running Magazine

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If it’s Thursday in Kona, it’s the Underpants Run!

Underpants Run Kona Gallery – Triathlete

If it’s Thursday in Kona, it’s the Underpants Run!

If it’s Thursday in Kona, it’s the Underpants Run!

Athletes strip down for underpants run at Ironman world championships - Canadian Running Magazine