Runners enjoyed panoramic views of London once they reached the top
Hundreds of fundraisers ran up the 1,037 steps inside one of London's most iconic buildings for charity.
More than 250 people raced up 38 floors inside 30 St Mary Axe, known as the Gherkin, to raise money for the NSPCC.
London's Gay Men's Chorus serenaded participants as they climbed the 180m (591ft) building in groups on Sunday.
At the top runners were handed a medal and a celebratory drink and given the opportunity to enjoy panoramic views of London while they caught their breath.
World swimming champion Keri-Anne Payne also took part in the challenge.
The event organisers were hoping to raise £125,000 for the NSPCC's Child's Voice Appeal.
Colman Cawe, of the NSPCC, said: "I'm extremely proud of how successful this event has been.
"Its popularity has been greatly down to the exclusive access we can provide to the Gherkin, which is thanks to the NSPCC London Business Group.
"I'd also like to thank everyone who will be taking part on the day; the money raised will be going towards our Child's Voice Appeal, which exists to maintain and grow the NSPCC's helplines."