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.
5. Recovery
Kevin Sinfield receives some physiotherapy at the fifth stop at Bunny Hill Top near Bunny, Nottinghamshire during the Extra Mile Challenge. Photo: Zac Goodwin/PA Wire
6. Cheered on
Kevin Sinfield poses for photographs with supporters at the sixth stop outside The Ruddington Arms pub in Ruddington, Nottingham Photo: Zac Goodwin/PA Wire
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