Our selection of the best, fastest, toughest, quirkiest and most enjoyable UK races this month

SOUTHAMPTON MARATHON FESTIVAL This is not just about the marathon, it’s a festival with a running race for everybody, including a mile fun run, a 5K, 10K and a half – there’s even a team option. Expec

26-27 September Range of distances including starter sprint (200m swim / 13km bike / 2km run) and super-sprint (400m swim / 20km bike / 4km run) Since 2009, the Hever Castle Triathlon has established

25-26 JULY 2026 City racing for all levels. Places now at t100triathlon.com 7 DORNEY DUATHLON FEBRUARY (various distances) Dorney Lake, Windsor atwevents.co.uk 15 GRAVESEND CYCLOPARK WINTER DUATHLON (

If you google ‘Fast, flat, European marathon’, then Berlin and Valencia races seem to hog the serach engine limelight. I’m here to recommend you do yourself a favour and look at nearby Seville instead

Let your running loose