Mr McIntyre has set up the 'In Jimmy's Footsteps' appeal, in his grandfather's memory, to raise money for Cancer Research UK.
His six-year-old granddaughter Belle was diagnosed with cancer in 2011.
"Belle is bright, funny and incredibly brave. The whole family has shown amazing strength and resilience during this difficult time and they are an inspiration to us all."
"Jimmy and Belle have both shown remarkable determination and I know this will be matched by Alistair and his resolve to raise as much money as possible for life saving research.
"In Jimmy's Footsteps is a wonderfully imaginative fundraising idea and everyone at the charity wishes Alistair and his supporters well as they embark upon their appeal."
The walk will take place from Fife to Deal, beginning in Lochore Mine where Jimmy once worked.
To find out more about the 'In Jimmy's Footsteps' appeal click here.
More top news
A look at the forecast for the Border region.
It's been the UK's driest first half of September since available records started in 1960.
With just hours to go until Scots go to the polls, we take a look at how the vote will unfold and answer your key questions.