Welwyn Half Marathon

ATW Welwyn Half Marathon & 10k takes place at Gosling Sports Park in Welwyn Garden City, Hertfordshire. The event offers a half marathon and, in 2025, a new 10k, with both races sharing the first 5km before diverging. The course starts and finishes on the stadium's 400m track, then runs along Welwyn and the traffic-free Cole Green Way, a disused railway line, with a short loop back to track.

It’s UK Athletics licensed and chip-timed, with marshals, a commentator, caterers, and free race photos. A free 400m children’s fun run precedes the main event; proceeds support Alzheimer’s Research UK. Visit the organization's website for the most recent information.