Mental health charity Mind is looking for 10 people from Hounslow to join its team of runners in a half marathon.
The Royal Parks half marathon takes place in Hyde Park on October 10 - world mental health day.
To mark the date - 10/10/10 - Mind is calling for 10 volunteers from each London borough to race the 13.1-mile course.
The event, now in its third year, attracts up to 12,500 runners and raises money for more than 160 charities, last year raising more than £2.5m for good causes.
Mind says that one in four people will experience a mental health problem at some point in their lives, and it is aiming to raise hundreds of thousands of pounds.
To sign up for Mind's team visit mind.org.uk/royalparks
The deadline is August 27.