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Boston’s New Lottery: What Are the Odds?

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The mass field of participants at the 2026 Boston Marathon.

This week, the Boston Athletic Association made a big announcement about registration for the 2027 Boston Marathon: there would be a new lottery for runners who met their qualifying time but missed the cutoff time. They also announced the dates for registration: September 14 to September 18. This means that the weekend of September 12-13 … Read more

Tokyo Marathon Data Follow Up: A Closer Look at the Field

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Feature image by nakashi on Wikimedia Commons – CC BY-SA 2.0 Last week, I published an analysis of the 2025 Tokyo Marathon and shared some insights from the data. I collected the preliminary results, including some demographic data and finish times, and came to three general conclusions: This analysis prompted a decent amount of discussion, … Read more