IAMS, a Mars-owned dog food brand, has partnered with Strava for a marathon challenge in September. Owners can log 26.2 miles with their dogs, with a $10,000 prize for one entrant. The challenge runs from Sept. 1 to Sept. 30.

This is IAMS's first marathon challenge on Strava, following a year-long partnership. The challenge counts various activities, not just running. Entrants must be U.S. residents aged 18 or older. The prize includes branded gear and dog food. Read more culture coverage.

Mars advises matching exercise to a dog's age and health. VCA, a Mars-owned hospital chain, suggests waiting until growth plates close. The American Veterinary Medical Association warns against running for some breeds due to health risks. Related: Norda and Black Diamond Launch Rugged Mountain Gear Collection.

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