Ms Shepherd, who is an NHS scientific support officer at Addenbrooke’s Hospital in Cambridge, is raising money for the WISHH Charity, which helps patients at the cancer unit in Castle Hill Hospital, Cottingham.
The charity said Ms Shepherd’s dad, who is a consultant clinical scientist at Hull Royal Infirmary, would “be with them in spirit” during the ride.
Ms Shepherd said stomach cancer had “struck dad out of the blue in September 2023” and, despite several operations, “he’s still battling on”.
She said the family’s cycle challenge was “our quest to give back” and that it would be “the biggest physical challenge I’ve taken on my own to date”.
Lisa Whitton of the WISHH Charity said: “We are immensely proud by the courage and resilience shown by the whole family and Ella’s decision to carry on with the challenge and Chris Hoy’s Tour De 4.
“Their determination is a true reflection of their strength and is an inspiration to us all.”