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Half marathons in London in September 2026

Find half marathons in London in September 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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Celebrate London’s diversity at The Big Half - a vibrant, inclusive half marathon through four iconic boroughs, where community spirit, culture and cheering crowds power every mile.
  • Sun 6 Sep
  • £15-£35
London

The Big Half

Celebrate London’s diversity at The Big Half - a vibrant, inclusive half marathon through four iconic boroughs, where community spirit, culture and cheering crowds power every mile.

  • 13.1 miles road running + 218 ft ascent
  • Families
  • Trees not tees
  • Venue accessible
  • Recycling
  • Beginner-friendly
  • Entertainment
  • Music
  • Chip timing
  • Enter online
  • GPS tracking
  • Flat
  • Traffic free
  • Fancy dress
  • Event village
  • Event expo
  • Urban
  • Sustainability policy
  • Age 17 & over
Be part of London's most exclusive event! Run through its greenest borough, exploring the beauties and history of Richmond. Start inside the Kew Gardens with a family music festival to finish!
  • Sun 13 Sep
  • £43-£50
Richmond

Richmond Half Marathon

Be part of London's most exclusive event! Run through its greenest borough, exploring the beauties and history of Richmond. Start inside the Kew Gardens with a family music festival to finish!

  • 13.1 miles road running + 91 ft ascent
  • Chip timing
  • Enter online
  • Flat
  • PB
  • Traffic free
  • Age 17 & over
  • Thu 10 - Sun 13 Sep
  • £200-£1,200
London

Run2Paris

  • 4 days multi terrain running
  • Sun 27 Sep
  • From £40
London

Ealing Half Marathon

  • 13.1 miles road running

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