The Leeds Rhinos legend set off from Leicester Tigers’ Mattioli Woods Welford Road stadium on Monday and has raised close to £1m after completing the feat.
Below are the pictures charting Sinfield's route from the midlands to West Yorkshire. Last year, Sinfield completed seven marathons in seven days to raise over £2.7m for MND charities.
7. Still going
Kevin Sinfield crosses Long Row in Nottingham city centre during the Extra Mile Challenge. Photo: Zac Goodwin/PA Wire
8. On the road again
Kevin Sinfield sets off from the seventh stop in Nottingham city centre during the Extra Mile Challenge Photo: PA Wire
9. In the dark of night
Kevin Sinfield makes his way to Outwood Primary Academy during the Extra Mile Challenge from Leicester to Leeds. Photo: Zac Goodwin/PA Wire
10. Coffee break
Kevin Sinfield during a rest stop at Starbucks, Neil Fox Way during the Extra Mile Challenge from Leicester to Leeds. Photo: Zac Goodwin/PA Wire
11. Cheered at the finish
Fans at Headingley Stadium wait for Kevin Sinfield to complete the Extra Mile Challenge from Leicester to Leeds. Photo: Zac Goodwin/PA Wire
12. Nearing the finish
Kevin Sinfield walks into Headingley Stadum with Macy Burrow (Rob Burrow's daughter) after completing the Extra Mile Challenge Photo: Zac Goodwin/PA Wire