Hazel Robson from Sunderland comes away from the Paralympics without a medal for the first time since she started competing twelve years ago.
She finished in seventh in the 100m final on Saturday night, running her season's fastest time of 15:23, less than a second behind the winner.
Hazel, who has cerebral palsy, won gold in Sydney in 2000, two silver medals in Athens in 2004 and a bronze in Beijing in 2008 - but in London, she could not keep up with her rivals.
Last week, she came fifth in the 200m finals.
She said she might carry on until Rio 2016, if her body allows her.
“I got off to a really good start but my legs felt like jelly towards the end. It was a really close race, but it wasn’t my day today.
“I was running for my cousin Thomas who also has cerebral palsy. I hope I can be an inspiration and role model for him.
“This has been an amazing experience but even with the crowds I can’t compare it to Sydney when I won a medal. This is my fourth Paralympics but if my legs want to I’ll keep going.”