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Half marathons in London in September 2025

Find half marathons near me in London in September 2025 - search by date or place, display on a map or use the advanced search to find your perfect race.

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Click an event for full event details, location, route, sustainability, what's included and how to enter.

The Big Half promises a party atmosphere on a landmark-packed, half marathon route which follows some of the famous marathon course in reverse!
  • Sun 7 Sep
  • 1 charity
  • Sun 7 Sep
  • 1 charity
London, UK

The Big Half

Secure your charity place in The Big Half today. Run for charity in a landmark-packed route around London while supporting top UK charities. Find a cause and join their team today!

  • Families
  • Trees not tees
  • Wheelchair users
  • Recycling
  • Newcomers
  • Entertainment
  • Music
  • Chip timing
  • Enter online
  • Flat
  • Traffic free
  • Fancy dress
  • Event village
  • Event expo
  • Urban
  • Sustainability policy
  • Age 17 & over
  • 13.1 miles road running
A team of 5. A half marathon every day for 4 days. You have just Run2Paris! This is your next great running adventure where you'll camp under the stars on a road trip like no other.
  • Thu 11 - Sun 14 Sep
  • £250-£1,250
  • Thu 11 - Sun 14 Sep
  • £250-£1,250
London, UK

Run2Paris

A team of 5. A half marathon every day for 4 days. You have just Run2Paris! This is your next great running adventure where you'll camp under the stars on a road trip like no other.

  • Newcomers
  • Enter online
  • GPS tracking
  • Fundraising required
  • Hilly
  • Urban
  • Public transport links
  • Age 18 & over
  • 4 days multi terrain running
London's flattest half marathon through its greenest borough exploring the beauties and history of Richmond. Start inside the Kew Gardens with family fun music festival to finish!
  • Sun 14 Sep
  • 2 charities
  • Sun 14 Sep
  • 2 charities
Richmond, UK

Richmond RUNFEST Half Marathon

London's flattest half marathon through its greenest borough exploring the beauties and history of Richmond. Start inside the Kew Gardens with family fun music festival to finish!

  • Chip timing
  • Enter online
  • Flat
  • PB
  • Traffic free
  • Age 17 & over
  • 13.1 miles road running
Get the #EalingFeeling at the triple Gold award winning UK No1 Half Marathon.
  • Sun 28 Sep
  • 1 charity
  • Sun 28 Sep
  • 1 charity
London, UK

Ealing Half Marathon

Get the #EalingFeeling at the triple Gold award winning UK No1 Half Marathon.

  • Recycling
  • Newcomers
  • Chip timing
  • Enter online
  • Traffic free
  • Event village
  • Park
  • Sustainability policy
  • Age 17 & over
  • 13.1 miles road running

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