Six-year-old Teagan Buck raised £450 for Myton Hospice in memory of her great grandpa.
The youngster from Rugby raised the money by taking part in the five-mile event around Draycote Water on March 17.
Teagan visited the Warwick hospice to present the money to the charity.
Her dad Jason Buck said: “As she neared the finish line, quite some time after everyone else, Warwickshire Ambulance Association, Myton staff and Northampton and Rugby Athletics marshals all cheered her to the end and clapped as she finished. She was cold but loved it and as a result we were able to take in the £450 sponsorship money she had raised to say thank you.”