Jennifer Lopez is Triathalon Tremendous

Jennifer Lopez participates in the Nautica Malibu Triathalon at Zuma Beach in Malibu, Calif., early Sunday morning. She completed the half-mile ocean swim, 18 mile out-and-back bike course, and 4-mile out-and-back run course and successfully competed it in 2 hours, 23 minutes and 28 seconds.

The competition, which was presented by Toyota, helped raise money for their charity partner, Children’s Hospital Los Angeles. For more information on the triathalon, visit NauticaMalibuTri.com.

The 39-year-old mother, who gave birth to twins Max and Emme almost seven months ago, is rumored to be throwing husband Marc Anthony‘s 40th birthday bash later tonight at the Bowery Hotel.

“She wants to make it a Cuban casino-themed party,” a spy snitched to the Daily News. “It will be like a casino from the ’60s, with everyone gambling.”

Throwing a birthday bash after competing in a triathalon? VERY impressive!

10+ pictures inside of triathlete Jennifer Lopez…

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