4 year old Josh McCormack from Rochdale has a rare brain tumour, which affects just 66 people in the world.
His family are hoping to travel to Munich to see whether Josh will benefit from proton therapy instead of radiotherapy, his only available treatment in the UK.
His family have organised a sponsored Santa walk/run starting from The Halfway House in Whitworth to Littleborough on the 12th of December.
They're also encouraging supporters to grow a moustache for Josh, raising money in the process during his 6 week radiotherapy, which starts on Monday 23rd of November.
To see the family's fundraising page click here