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London 100

09 May 2026 (Sat)

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100km, 50km, 25km

London 100

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Join London 100 2026

London's longest run is back!

London 100 is Central London's ultramarathon. With 3 challenge distances (100km, 50km, and 25km), the event has distances for experienced ultramarathoners, and for those stepping up from marathons or half marathons.​

From a superb indoor Central London Run HQ, four 25km routes explore north, south, east and west of the capital. Experience areas of London you never knew existed, discover the capital's hidden trails and enjoy the famous sights and landmarks of one of the world's greatest cities - all in one long run.

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Course details

Course profile
flat
Course surface
Road
Other tags
Asphalt
Beginner Friendly
Bridge
Capital
Castle
City
Historical
Night
Park
River
Out and Back
100-999 Participants
Charity
ECO Friendly
Course highlights
London 100 is made up of four routes - taking in the best of Central London to the four corners of NORTH, SOUTH, EAST and WEST
We've been the route to take in over 100 major London landmarks including:
Big Ben,
Tate Modern,
Battersea Power Station
BBC Centre,
Brixton
London Eye
Albert Hall
Primrose Hill
St Pauls
Hampstead Heath
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Start address: Vauxhall Bridge Road, London SW1V 1EL, UK

Finish address: Vauxhall Bridge Road, London SW1V 1EL, UK

Route map

London 100 Route Map

Register

Registration closes on 02 May (282 days left)

London 25

25.00 Km

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68 EUR


London 50

50.00 Km

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103 EUR


London 100

100.00 Km

More information

149 EUR


selected tickets

selected tickets

Total

0 EUR

You can, within 24 hours after your registration, get a full refund if you change your mind.

We accept Visa MasterCard AMX PayPal Revolut Pay iDEAL WeChat Pay AliPay Swish Mobile pay

What’s included

These are included in your entry
  • done Finisher medal

  • done Timing chip (single use)

  • done Training program

  • done Drink Stations

  • done Nutrition Stations

  • done Medical Assistance

  • done Bag drop

  • done Toilets

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Frequently asked questions

When and where can I collect my BIB/race pack?

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Your bib number and chip will be allocated on arrival (Race day). Location: Queen Mother Sports Centre via the Longmoore St entrance.

What is the cancellation/refund policy for this event?

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As per the terms and conditions of entry, we unfortunately cannot provide a refund or deferral, but we do have a flexible policy, so here's what is available to you if you did want to cancel: - You can transfer your entry to someone else or to a different distance, if completed before 4 May 2026 (11:45pm). A transfer can be a transfer to someone else or to a different distance (subject to availability). There is a £15 fee for transfers. Please see next question for help on transferring your place - If you are unable to transfer, then please email us and you can be entered on to our list to receive a priority entry period and discount to the following year's event. As long as this email is received before 8 May 2026, it will be accepted and you'll be added to our list.

What distances are available?

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London 100 includes the following distances: London 100km ultramarathon London 50km ultramarathon London 25k

Can I have a pacer/buddy run with me?

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Yes, but only in the 100km and only in the final 25km leg (West). Pacers/buddies are not permitted in the 50km and 25km challenges.

What do you recommend participants bring with you?

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There is no mandatory kit list, but we do strongly recommend the following: - fully charged mobile phone (with Event Control number saved) - downloaded route files/Google maps to help you navigate - What3Words app, to help you pinpoint your exact location to Event Control - payment card - for any local purchases (as an urban-ultra you will pass many local shops, if you need anything)

London 100

local_activity Deals & discounts

verified_user Refundable Booking option

credit_card Secure payments

The race information has been found on the official website of the event or through publicly available sources. Always refer to the official website the latest race information. Please let us know if any data is wrong or missing, by emailing us.