London Big Half Marathon 2025 Dates. The 13.1 mile course weaves through london from tower bridge to the iconic cutty. Please call our freephone national helpline on 08088 020 021.

Join team deafblind uk, and over 16,000 runners, racing 13.1 miles through the buzzing. Take part in the big half marathon on sunday 7 september 2025 and help make a massive difference to staff and patients at the royal free london nhs foundation trust.