Skip navigation
Sign up to follow your favorites on all your devices.
Sign up

WATCH LIVE: 2019 Ironman Kona World Championships

IRONMAN World Championship

KAILUA KONA, HI - OCTOBER 13: Matt Russell of the United States celebrates with a Blazeman roll after crossing the finish line during the IRONMAN World Championships brought to you by Amazon on October 13, 2018 in Kailua Kona, Hawaii. (Photo by Nils Nilsen/Getty Images for IRONMAN)

Getty Images for IRONMAN

The Ironman Kona World Championships -- a grueling 140.6-mile triathlon in sweltering Hawaii -- stream live on and the NBC Sports app on Saturday.

A year after shattering course records, German Patrick Lange and Swiss Daniela Ryf defend their world titles.

The men’s race starts at 6:25 a.m. local time (12:25 p.m. ET) with the 2.4-mile swim. The women start in Kailua Bay water five minutes later. The swim is followed by a 112-mile bike on the Queen Ka’ahumanu Highway and then a marathon to the Kona finish line.

The fastest triathletes will complete the course in eight hours.

NBCSN coverage runs from noon-2 p.m. ET. NBC and NBCSN will also have occasional check-ins throughout the afternoon, culminating with finish coverage around 8:30 p.m. ET.

On Sunday, NBCSN will air a recap show from 2-3 p.m. ET.

WATCH LIVE: Ironman Kona World Championships, 12:25 p.m. ET -- STREAM LINK

OlympicTalk is on Apple News. Favorite us!