Police in California have launched an investigation after 27 participants fell ill and required medical treatment following the Santa Barbara Half-Marathon. The incident occurred on Sunday, November 8, 2026, when several runners reported unusual symptoms after completing the race. According to health authorities, a number of participants were taken to hospitals in Santa Barbara and Goleta for emergency treatment. The exact cause of the illnesses has not yet been determined.
According to hospital officials, 27 runners were treated in emergency departments after experiencing similar symptoms of unknown origin. By Monday morning, 24 patients had received treatment and been discharged, while three others remained in stable condition. Around 7,500 people participated in the 13.1-mile race. Temperatures reached approximately 31 degrees Celsius, creating unusually hot conditions for November. Race organisers believe that heat, dehydration and physical exhaustion may have contributed to the incident.
Police are continuing their investigation to determine what caused so many participants to become ill during the event. Authorities have not ruled out other possible factors, although no evidence of contamination has been confirmed. Race organisers said their medical teams provided assistance to runners suffering from overheating and dehydration during and after the competition. Officials have advised anyone experiencing unusual symptoms to seek medical attention while investigations continue.
