He’s been swooped by owls and once hit a kangaroo, but Sydney medico Dr Jonathan Egan hasn’t let the local wildlife stop him completing a gruelling world-leading cycling feat.

The Children’s Hospital at Westmead paediatric intensivist has notched up 102 ‘Everestings’, a challenge that requires cycling the vertical height of Mount Everest.

To complete an Everesting, a cyclist must ride up and down a hill repeatedly until the equivalent of the 8848m Mount Everest peak is reached.

Worldwide cyclists have done more than 14,600 successful Everestings in 98 countries covering a combined distance of over 5 million km.