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.
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