The 29 year old chef from the Lake District collapsed at the 22.5 mile mark and received immediate medical treatment, but sadly died later in hospital.
He had been running in memory of his late father and hoped to raise £1,750 for the Cumbria-based Brathay Trust.
The Brathay Trust, based in the Lake District and the North of England, aims to inspire vulnerable young people to make positive changes in their lives.
Since his death was announced, donations to the charity via Mr Campbell’s JustGiving page have reached over £89,000 in tribute.
A spokesman for the Brathay Trust said: “He was a real creative chef and one of the things he was very keen on doing was sharing that knowledge with young chefs who wanted to get involved in the industry.
“He was such a great athlete and also a wonderful supporter of Brathay.”
Matt Campbell had appeared on the BBC’s MasterChef: The Professionals in 2017 and reached the semi-finals. He had previously worked in Michelin-starred restaurants after finishing second in the BBC’s Young Chef of the Year aged 20 in 2009.
Hundreds of social media tributes have been paid to the chef, described as “lovely and kind-hearted” by family and friends.
Chef Marcus Wareing, who had been a mentor to Mr Campbell on MasterChef: The Professionals, said, “It is with huge sadness that I received the news of Matt Campbell’s untimely death earlier today. He was a talented, innovative and driven chef with a bright future ahead of him. My thoughts are with his friends & family at this tragic time.”