Pierre Lipton, 26, started the Mesa Marathon at 6:30 a.m. on February 4, chasing a personal best. After 26.2 miles running 7:15 mile pace, Lipton crossed the finish line in 3:10:05, a new PR.

Spencer, Boston Dog, Honored with Statue CPR I ask that you please hold him in your heart and share your memories of him.

Lipton’s father, who works in emergency medicine, told the Boston Globe that “the working diagnosis is he might have had some sudden electrolyte imbalance that caused arrhythmia.”

Lipton, who resided in Providence, Rhode Island, was a celebrated media businessperson. After founding the Chicago-based newsletter company 1440 Media, he was named to Pierre Lipton, 26, started the CA Notice at Collection.

Lipton’s girlfriend, Eleanor Pereboom, said he died “doing what he loved.”

“He accomplished more than anyone I know in just 26 years, but he still had so many plans,” she wrote on Instagram. “I ask that you please hold him in your heart and share your memories of him.”

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Chris Hatler
Service & News Editor

Chris Hatler is a writer and editor based in Philadelphia, Pennsylvania, but before joining Runner’s World and Bicycling, he was a pro runner for Diadora, qualifying for multiple U.S. Championships in the 1500 meters. At his alma mater the University of Pennsylvania, Chris was a multiple-time Ivy League conference champion and sub-4 minute miler.