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Road Half marathons in Hertfordshire in October 2026

Find road half marathons in Hertfordshire in October 2026 - filter by date, location or category, display on a map or use the advanced search to find your perfect race.

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The popular Welwyn Half Marathon starts and finishes on the impressive 400m athletics track at Gosling Sports Park with an ideal, traffic-free, disused railway line in between.
  • Sun 4 Oct 2026
  • £31-£33
Welwyn Garden City, Hertfordshire, UK

ATW Welwyn Half Marathon

The popular Welwyn Half Marathon starts and finishes on the impressive 400m athletics track at Gosling Sports Park with an ideal, traffic-free, disused railway line in between.

  • Chip timing
  • Enter online
  • Traffic free
  • Age 17 & over
  • 13.1 miles road running + 400 ft ascent

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