London 100 - Saturday 10th 07:00 - Saturday 10th May 2025 23:55

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London 100

Before you enter London 100

London 100 - choose from London 100km ultramarathon, London 50km ultramarathon or London 25km.

Stunning route through and around central London, incorporating 100 of the capital's best landmarks and sights. Enter today to receive:

  • Super-cool medal
  • Great community support
  • Ultimate bragging rights

Please note:

  • Start times: will start from 7am and will be dependant on distance chosen and your estimated completion time. The start waves will be started in small groups.
  • Cut off times: The event does have cut off times. There is up to 17 hours to complete the course (calculated from the estimated completion times provided on registration). The event ends at midnight, no exceptions.
  • Age restrictions: All entrants must be 18 or over on the day of the event
  • Open road event: This is NOT a closed road event. The event is on trails, towpaths, pavements and footpaths in and around London. Participants will need to cross roads at pedestrian crossings and take care with other pavement users at all times.

Registration

£ 129.00
London 100km
£ 129.00
London 100km Individual (Ages 18 - 130)


£ 64.50
London 100km HALF PRICE charity entry
£ 64.50
London 100km Charity (Ages 18 - 130)
Linked to Charity: Aspire


£ 89.00
London 50km
£ 89.00
London 50k (Ages 18 - 130)


£ 44.50
London 50km HALF PRICE charity entry
£ 44.50
London 50km HALF PRICE charity (Ages 18 - 130)
Linked to Charity: Aspire


£ 44.50
London 50km VOLUNTEER and RUN
£ 44.50
50km Challenge - Volunteer and Run (Ages 18 - 130)


£ 59.00
London 25km
£ 59.00
London 25km (Ages 18 - 130)


£ 29.50
London 25km HALF PRICE charity entry
£ 29.50
London 25km HALF PRICE charity entry (Ages 18 - 130)
Linked to Charity: Aspire


£ 29.50
London 25km - VOLUNTEER and RUN
£ 29.50
London 50km - Volunteer and Run (Ages 18 - 130)


Make A Donation

Even if you're not taking part in London 100 you can still do your part for a good cause by making a donation.

 Event Merchandise View store

  • London 100 hoodie London 100 hoodie

    £

    London 100 hoodie
    London 100 hoodie

    Premium London 100 hoodie. Collected at the event.


    £



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  • London 100 t shirt (unisex) London 100 t shirt (unisex)

    £

    London 100 t shirt (unisex)
    London 100 t shirt (unisex)

    London 100 t shirt. Technical t shirt. Collection at event


    £



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  • London 100 t shirt (female fit) London 100 t shirt (female fit)

    £

    London 100 t shirt (female fit)
    London 100 t shirt (female fit)

    London 100 female fit t shirt. Technical fabric. Collected at event


    £



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  • London 100 bucket hat London 100 bucket hat

    £16.50

    London 100 bucket hat
    London 100 bucket hat

    London 100 bucket hat - one size. Collection at event


    £16.50



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About London 100

London 100 is London's longest run.



London 100 is Central London's only ultramarathon. London 100 is now LIVE.



London 100 is an urban-ultra. An ultramarathon starting and finishing in central London. A route showcasing the very best that the capital has to offer and run route taking in 100+ of London's top landmarks.


  Log in to your account

If you've registered on race-nation.co.uk before, sign in here

Contact London 100

Aspire


Registration Number: 1075317
Register