Cycling policeman Paul Freeman is pedalling 2,162 miles – the same distance as the Tour de France – over the next three weeks.
Paul (47), from Moulton Seas End, aims to do 94 miles a day and fit the bike rides around his duties at Holbeach Police Station.
The sponsored ride is in memory of his parents, Brenda and Stan Freeman, who lost their lives to cancer and every penny raised will go to Cancer Research UK to help beat the disease.
Paul said: “I started it on Saturday. In the first two days I managed 98 miles but now I have two rest days so I should be getting some more miles in.”
He’s cycling to and from work on his racer, adding extra miles to the journeys, as well as going out on special trips.
“I live about five miles from work and leave maybe an hour-and-a-half to two hours early to try to do about 30 miles around some of the country roads,” he said.
“At the end of the shift I try to do a few more miles on the journey home.”
Paul and his wife, Claire, have two sons, George (7) and James (5). Paul’s mum died four years ago aged 71 and his dad in January last year aged 76.
He said both survived for about 18 months after being diagnosed with cancer and their loss was a big shock to the family.
“Our elder boy was just about to start school when my mum died, she’s never seen him at school,” said Paul.
Paul joined Lincolnshire Police just over five years ago.
He started cycling seriously three years ago, but has been “on and off” a bike all of his life.