Hatfield 5K Series

The Affinity Hatfield 5K Series 2025 is a midweek running event held in Hatfield, United Kingdom, featuring three consecutive 5K races on Wednesday evenings in late August and early September. The series includes the Hertfordshire Senior and Veterans Championships, with a maximum of 300 participants per race. The course is certified for accuracy and follows UK Athletics rules.

Runners enjoy electronic timing, live online results, drink stations, medical support, and enthusiastic marshals along a well-marked route. Awards are presented after each race and for the overall series, with prizes for individual and team performances across various age groups. The event is hosted at Affinity Water HQ with parking and excellent facilities. Visit the organization's website for the most recent information.