Matt Campbell, 29, who completed the Manchester Marathon in under three hours earlier this month, was a semi-finalist in MasterChef: The Professionals in 2017.
He died after collapsing at the 22.5-mile mark while running in Sunday’s London Marathon, the hottest ever.
The professional chef had hoped to raise £2,500 with his run, but the target was reached - and passed - soon after news of his death.
By Friday morning, £200,000 had been donated to his JustGiving fundraising page.
Campbell was running for the Brathay Trust, to improve the life chances of children, young people and families, and in memory of his father.
Donations on his page increased minutes after the death was announced.
The marathon was Campbell’s second in two weeks after completing a race in Manchester.
According to his biography on his website, Campbell began his career working in Michelin-starred kitchens after finishing second on BBC Young Chef Of The Year at the age of 20 in 2009.
Speaking about running the marathon in honour of his late father Martin, he wrote on Instagram in February: “Words can’t describe how honoured and humbled I feel to be asked to run this year’s @londonmarathon on behalf of @brathaychallenges/@brathaytrust and in memory of my Father, Martin Campbell.
“It’s been almost 18 months since I lost my dad and this has been the most challenging period of my life.
“One thing that has helped me immensely is running and he inspired me to undertake my first marathon (Brathay) in 2016.
“I would never have believed two years on I would have the opportunity to represent such an incredible charity at such a prestigious event. Fundraising for Brathay with the proceeds going towards their memorial appeal in my father’s name.”
Details of the JustGiving page can be found here - https://www.justgiving.com/fundraising/mattcampbell-londonmarathon