MarathonInvestigation

Most investigations featured on Marathon Investigation begin with a suspicious race result.

Prelude There’s no way to make this short.

A bizarre sequence of claims following the Las Vegas Purple Run half marathon has drawn scrutiny after a runner was credited with a time that would have shattered the women’s world record—while both the runner and a family member reportedly insisted the p…

Timing data from the Philadelphia Marathon has identified a performance displaying a pacing pattern commonly associated with a shortened course on out-and-back marathon routes.

Support Marathon Investigation You can contribute at the bottom of this page — or directly via: PayPal: paypal.me/marathonsleuth | Venmo: @MarathonInvestigation The New York City Marathon is one of the few races on earth where simply finishing is an achie…

I pulled the results a few days after the race.

The woman who used a bib from the 2016 Brooks Memphis Twilight race to claim victory at a Chicagoland 5K has been identified.

A race director says a woman used a bib from a Memphis Twilight event to win a local race, take home the first-place prize, and leave before anyone realized she wasn’t registered.

Three suspicious patterns reveal course cutting and impossible segment paces among 2025 Chicago Marathon finishers.

A runner says she ran “sub-4” at the 2025 Berlin Marathon.