London 100
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.
Course details
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
Start address: Vauxhall Bridge Road, London SW1V 1EL, UK
Finish address: Vauxhall Bridge Road, London SW1V 1EL, UK
Route map
Register
Registration closes on 02 May (282 days left)
selected tickets
Total
You can, within 24 hours after your registration, get a full refund if you change your mind.
We accept
What’s included
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done Finisher medal
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done Timing chip (single use)
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done Training program
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done Drink Stations
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done Nutrition Stations
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done Medical Assistance
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done Bag drop
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done Toilets
Reviews
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Frequently asked questions
When and where can I collect my BIB/race pack?
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?
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?
London 100 includes the following distances: London 100km ultramarathon London 50km ultramarathon London 25k
Can I have a pacer/buddy run with me?
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?
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)
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.
