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A Boulder woman essentially did 20 Ironman Triathlons in 26 days, beating a world record by 9 hours – The Denver Post
The Mighty Tri: Double...Triple...Quadruple....Quintuple...Deca...Double Deca...what's it all about and why I don't get it
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Ironman vs. Ultramarathon: Endurance Athletes Who Do Both - Trail And Ultra RunningTrail And Ultra Running
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