# Edmonton Marathon course measurement dispute

> Live situation record from CLSTR: https://clstr.news/situations/edmonton-marathon-course-measurement-dispute
> Updated: 2026-08-19T01:38:51.000Z. Sources: 9. Developments: 2.

The 35th Servus Edmonton Marathon faced controversy regarding the accuracy of its course measurements. Initially, race officials and Athletics Canada defended the course, asserting it had been professionally measured and certified. They attributed discrepancies reported by runners via GPS devices to factors such as signal drift and construction-related detours.

However, organizers later issued an apology and admitted the marathon and half-marathon courses were approximately 674 to 675 metres longer than intended. The error was attributed to a miscalculation during course adjustments made to accommodate a bridge detour. 

Despite the measurement error, the event saw historic performances, including new course records in both the men’s and women’s races. The organization is currently coordinating with Athletics Canada to address how the results will be handled, particularly as the race serves as a qualifying event for major competitions like the Boston Marathon.

## Timeline

### 2026-08-19: Edmonton Marathon apologizes for incorrect course measurement

The Edmonton Marathon apologized after admitting its course was approximately 675 metres longer than intended due to a miscalculated detour adjustment.

8 sources. https://clstr.news/cluster/edmonton-marathon-apologizes-for-incorrect-course-measurement

### 2026-08-16: Edmonton Marathon faces course measurement dispute

Runners at the Edmonton Marathon are disputing course distances after GPS data showed longer routes, despite officials maintaining that the certified measurements are accurate and valid.

2 sources. https://clstr.news/cluster/edmonton-marathon-faces-course-measurement-dispute

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Cite as: Edmonton Marathon course measurement dispute. CLSTR, https://clstr.news/situations/edmonton-marathon-course-measurement-dispute