Enter Now You can enter this event on the official ActiveTrainingWorld website. Enter Now Event Info Run Fest at Lee Valley Half Marathon: 2 Laps 10K: Single Lap Course Profile: Flat and Fast Organiser: Active Training World Other ATW Events Running Events: New Years Day Love Welwyn Garden City 10K Essex Fast 10k/5k Hillingdon Half & 10K Welwyn Half Marathon Run Fest at Lee Valley Ten Fest at Lee Valley St Albans 10K Hatfield 5 Herts Fast 10k/5k Multi Sport Events: Ashridge Duathlon Hertfordshire Triathlon Stewartby Lake Triathlon Box End Triathlon Centurion Triathlon Bovingdon Beast Duathlon Essex Duathlon