Edmonton Marathon Admits 2026 Course Was About 675 Metres Too Long

Organizers of the 2026 Edmonton Marathon have admitted that the marathon and half-marathon routes were about 675 metres longer than their official distances. The acknowledgement followed complaints from runners whose recorded distances and finishing times did not match what they expected from the certified course, according to reporting by The Guardian and CBC News.

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The races took place in Edmonton on Sunday, August 16. The event advertised its full marathon as a Boston Marathon qualifier, while the half marathon incorporated the 2026 Canadian Half Marathon Championships. Athletics Canada had announced Edmonton as the championship host for a second consecutive year, bringing leading Canadian distance runners to the Alberta capital.

Race director Tom Keogh said a detailed review found an error in the way course changes had been calculated. Organizers had initially defended the route as certified and correctly measured, but undertook another examination after receiving concerns from participants, including elite athletes. The subsequent review confirmed that the physical course did not match the intended distance.

The problem stemmed from a detour introduced because of construction around Wellington Bridge. According to the organizers' account, the extra distance created by that detour was only partly offset by moving the western turnaround point. The adjustment therefore failed to remove enough distance from the out-and-back route, leaving both affected races approximately 675 metres too long.

The mistake has consequences beyond runners covering additional ground. Finishing times from an overlong route do not accurately represent performances over the standard marathon distance of 42.195 kilometres or the standard half-marathon distance. The Guardian reported that runners chasing personal bests or qualification for the Boston Marathon were among those potentially affected, where relatively small differences in finishing time can matter.

Organizers accepted responsibility and said the integrity of the course distance was fundamental to the event. They are working with Athletics Canada and other relevant partners to determine how the 2026 results can be recognized, including for athletes seeking qualifying marks or records. The event also said it would review its certification processes with its partners to prevent a repeat of the error.