Edmonton Marathon Apologizes for Adding Nearly 675 Metres Extra to Course
Race organizers initially defended the course length, before admitting in a second statement that a construction detour was to blame.

TL;DR
- Edmonton Marathon organizers acknowledged a measurement error, finding the course was 674.7 metres longer than intended.
- The error affected the full and half marathon distances, impacting runners' Boston Marathon qualification attempts.
- Race director Tom Keogh initially defended the course length before issuing a second statement admitting the mistake.
- A construction detour is cited as the reason for the discrepancy.