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Flat Marathons in South East in October 2026

Find flat marathons in South East 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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Enjoy stunning coastal views on this flexible-distance run at Milford on Sea, following an out-and-back route beside Sturt Pond and the Isle of Wight — perfect for all abilities.
  • Sun 25 Oct
  • £37.50-£39.50
Lymington, Hampshire, UK

Wight Lines

Enjoy stunning coastal views on this flexible-distance run at Milford on Sea, following an out-and-back route beside Sturt Pond and the Isle of Wight — perfect for all abilities.

  • 7 hrs trail running + 47 ft ascent
  • Beginner-friendly
  • Enter online
  • Flat
  • Event village
  • Coast
  • Public transport links
  • Age 18 & over
Race a fast, flat and traffic-free marathon at Dorney Lake, the London 2012 Olympic rowing venue, with lakeside scenery, great atmosphere and excellent runner support throughout.
  • Sun 25 Oct
  • £37-£39
Windsor, Buckinghamshire, UK

Windsor Dorney Lakeside Marathon

Race a fast, flat and traffic-free marathon at Dorney Lake, the London 2012 Olympic rowing venue, with lakeside scenery, great atmosphere and excellent runner support throughout.

  • 26.2 miles road running
  • Venue accessible
  • Beginner-friendly
  • Chip timing
  • Enter online
  • Flat
  • Traffic free
  • Event village
  • Age 18 & over

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