Welwyn Half Marathon A local challenge for local runners! Starting and finishing at Gosling Running Track, this route takes runners along a mixture of local settings including both residential and rural visiting villages of Hertingfordbury, Birch Green and Cole Green plus a 4 mile section along the traffic free Cole Green Way pathway. The running track at Gosling Sports Park will be a great spectator location on the day so do bring friends and family to cheer you on! Entry price is £25 per person. Please get in touch by email or call us on 01707 382544.