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Sep 5, 2027
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Starting at Tower Bridge, the iconic route follows the Thames Path westward through central London's most famous landmarks. Runners pass Westminster Abbey, Houses of Parliament, and cross Millennium Bridge before finishing near Tower Bridge again in a stunning riverside setting.
Typical climate for the race month — an estimate, not a forecast or a race-day record
Spring weather with mild temperatures and occasional rain. Runners should expect cool conditions but generally pleasant running weather typical of London in April.
The Race
London
Launched in 2017, the The Big Half is one of the newer races on the circuit. Despite its youth, it has quickly built a reputation in London, attracting runners drawn to its flat roads and scenic routes and the energy of an event still finding its identity.
Runners come to the The Big Half for one reason: personal bests. The flat, fast course through London has a reputation as a PB factory, with the roads seemingly designed to keep your pace honest and your splits consistent from start to finish.
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