George Young, of Peterborough, has joined in alongside many others to help raise money for the NHS and has already smashed his £300 target.
From May 12 to June 11, George will be running 200km, meaning he will need to complete an average of 6.6km per day.
He said: "I have decided to run 200km which is an average of 6.6km per day or 50km per week.
"I wanted to raise £300 for the NHS, but I've already surpassed £400 and I still have 185km to go.
"The money will be donated to NHS Charities Together to support people in need of assistance during this difficult time.
"If you want to support me, any help would be appreciated."
At the time of writing, George went over his target by 153pc, having raised £460. If you wish to donate to the cause, click here.
The country have all been playing their part in raising money for NHS Charities Together, from Captain Tom Moore doing laps of his garden to various locals taking part in personal challenges.
The total raised for the NHS so far stands at a mind-blowing £103,886,861.07, with more people raising funds every day.