The Servus Calgary Marathon, Canada's longest running marathon, is celebrating 60 Years Running on May 26, 2024! For 6 decades, the Servus Calgary Marathon has been at the forefront of running in Canada, attracting runners from all over the world to discover Calgary, while staying true to its western roots and loyal to local runners. With 6 distances to choose from and the option to run, walk or use your mobility device, there’s a race for every age and ability.