Rhythwyn Evans had completed 21 tours of the property on the Tan-y-Graig farm in Silian, Ceredigion, before breakfast on Saturday – his 91st birthday.
The grandfather, who uses a walking stick, has already raised more than £ 12,000 for his local charity.
Evans said he lived to “old age” and wanted to “give something back to the community.”
Evans launched the challenge in solidarity with Capt Tom Moore, who has so far raised over 23 million pounds for NHS Charities Together by browsing around his garden to mark his 100th birthday.
Evans’s family said on a JustGiving page that they celebrated their 90th birthday with family, neighbors and friends, but wanted to do something different to give something back to the community during the coronavirus crisis.
“Inspired by and in solidarity with Capt Tom Moore, he took on a personal challenge to go around his house 91 times in one day, to help defeat the Covid-19 epidemic,” they wrote. .
“Rhythwyn would like to support his local health council, Hywel Dda, to show his gratitude for the exceptional work of the workers in these extremely difficult times.”
The money raised by the nonagenarian will go to the call Hywel Dda NHS Covid-19, organized by Hywel Dda Health Charities.
Evans has already smashed his original goal of £ 1000.