31-year-old Darren Brettell rode the Millennium Roller Coaster at Fantasy Island in Lincolnshire 140 times over the two days of last weekend.
He told the Skegness Standard newspaper: “I decided to do the challenge because my mum passed away a few years ago and I enjoy riding rollercoasters and visiting Fantasy Island so I thought it was a brilliant way to combine the two.”
Darren raised £365 for the charity, with Fantasy Island making a contribution taking the total up to £500.
A spokesman for the park said: “We are pleased that we could help Darren in his charity event and would like to congratulate him for his efforts and success.
“Cancer Research is an extremely worthy cause and we would like to contribute to bring his total funds raised to £500.”
Millennium Roller Coaster is noted for its striking yellow and red paintwork, and was constructed at the resort in 1999.
It is widely considered to be one of the smoothest rollercoasters in Britain.