Brits spurred on by the nation's Rio Olympics gold rush have been urged to hit the streets of London to help fund a better education for some of the country's poorest children.
Participants can walk, jog or run 5km or 10km that evening, from 7pm, along a scenic riverside route taking in landmarks like the Tower of London and Tate Modern.
The event, now in its third year, helps fund Teach First's work in schools across England and Wales to tackle educational inequality and ensure no child's life chances are limited by their parents' income.
This September, Teach First will place over 600 highly talented teachers at 378 schools in deprived communities across London and the south east, reaching thousands of children.
'Fun atmosphere and unique location'
Run the River is sponsored by Teach First supporters Citi.
The firm's managing director Lou McCrimlisk, who will take part this year, said: "Run the River is a great event and one that Citi is incredibly proud to support. Our employees and clients really look forward to the run – it has a fun atmosphere and unique location.
"We passionately believe in Teach First's vision – to not let economic disadvantage determine a child's destiny. By supporting this charity and being involved in Run the River, we are proud to help Teach First's vision become a reality."
Entry usually costs £40, which includes chip-timing, a medal and an official T-shirt, but readers can sign up using the discount code TRINITY to receive a fantastic £15 reduction, bringing the cost down to just £25.