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.
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FINISH LINE: Kevin Sinfield stands with Rob Burrow after completing his Extra Mile challenge. Picture: PA Wire.
. Setting off
Kevin Sinfield started his run at Leicester Tigers' Mattioli Woods Welford Road Stadium. Photo: Zac Goodwin/PA Wire
. First leg
Kevin Sinfield during the first stop in the Extra Mile Challenge Photo: Zac Goodwin/PA Wire
. Early hours
Kevin Sinfield passes through Mountsorrel near Loughborough during the Extra Mile Challenge. Photo: Zac Goodwin/PA Wire
. Rest stop
Kevin Sinfield at the third stop in Barrow upon Soar during the Extra Mile Challenge. Photo: Zac Goodwin/PA Wire
. 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
1. Setting off
Kevin Sinfield started his run at Leicester Tigers' Mattioli Woods Welford Road Stadium. Photo: Zac Goodwin/PA Wire
2. First leg
Kevin Sinfield during the first stop in the Extra Mile Challenge Photo: Zac Goodwin/PA Wire
3. Early hours
Kevin Sinfield passes through Mountsorrel near Loughborough during the Extra Mile Challenge. Photo: Zac Goodwin/PA Wire
4. Rest stop
Kevin Sinfield at the third stop in Barrow upon Soar during the Extra Mile Challenge. Photo: Zac Goodwin/PA Wire
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