Several runners, including elite athletes, claim the Edmonton Marathon course was longer than advertised. Calgary runner Polly Cunes alleged the course was 700 to 900 meters longer. Rory Linkletter, Canadian half-marathon record holder, supported the claim. The Edmonton Marathon insists the course was measured accurately.

Race director Tom Keogh stated they accounted for a detour, adding 712 meters. GPS technology can overestimate distances, especially in urban areas. The marathon maintains its course was professionally measured. Athletics Canada supports the marathon's stance. Read more culture coverage.

GPS inaccuracies can occur in challenging environments. Newer technology can reduce errors. Cunes acknowledged runners might add distance by weaving or rounding corners wide. Elite runners, however, generally take the shortest line and still reported extra distance. Related: Marathons and Half-Marathons Without Lotteries Still Available.

This original Runner World brief is based on reporting from Canadian Running. Visit the source for its complete reporting, context and any later corrections.