The Great South Run is a road running race held annually in Portsmouth, United Kingdom, covering a distance of 10 miles, which is approximately 16.09 kilometers. The course is relatively flat and scenic, starting from Southsea and passing through iconic locations in Portsmouth such as the coastline, the cathedral, the Spinnaker Tower, and the Marine base before finishing near the starting point at the Pyramids Centre. This event is one of the most significant road races in the UK. The 10-mile distance is shorter than a half marathon but longer than a 10K race, making it a popular intermediate running challenge.