The St. Marys Quarry was formerly a limestone Quarry that closed in 1920. In the mid-1940s it was converted into a public swimming area and remains one of the most popular spots in the area to visit on hot summer days. The Quarry will be used for the swimming portion of the Triathlon competition while the cycling and running portions will take place on streets that will be closed throughout the town of St. Marys. For a map of the course including road closures and other event information, please click here