The TCS London Marathon 2027 takes place on 24 and 25 April in a one-off two-day format, with 100,000 participants expected across the weekend. Both days follow the iconic route from Greenwich and Blackheath through central London to Westminster.
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TCS London Marathon 2027
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Practical information
The 2027 TCS London Marathon will take place on Saturday 24 and Sunday 25 April in a one-off two-day format. A record 100,000 participants are expected across the weekend. Both days use the same 26.2-mile route from Greenwich/Blackheath to The Mall in central London. Check the official event website for race-day information, course details and travel updates.
The marathon course passes through Greenwich, Deptford, Rotherhithe, Bermondsey, Tower Bridge, Canary Wharf and Westminster before finishing on The Mall. The 2027 event is a special two-day edition; participants run on either Saturday 24 or Sunday 25 April. The official spectator guide includes viewing and travel information.
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