Cancer Research UK is bringing its night-time walking marathon, Shine, to London for the first time this October.
Those who take part are encouraged to wear bright, reflective clothing and carry torches or balloons to light up the night, and symbolise a hopeful future in the treatment of cancer.
The Shine London Marathon starts at The O2 in Greenwich, and follows a circular route into central London. It goes past the Cutty Sark, over Lambeth Bridge, and takes in other landmarks like the Eye, the Houses of Parliament and St Paul's on the way. Some of these buildings will be specially lit for the occasion.
There's both a full marathon (starting at 8.30pm) and a half marathon (11.30pm) option on 1 October. Entrance is £30, which covers the cost of staging the event, meaning all the lovely sponsorship money you raise can be spent on actual research into cancer.
If you fancy taking part, you have until 26 September to sign up.
For more info and to register, visit www.cancerresearchuk.org/shine