There will be children, parents, carers and parishioners among the climbers. A piper will herald their departure from Penicuik Leisure Centre at 8 o’clock on Thursday morning.
There they will meet Dr Gerry McPartlin who is nearing the end of his bid to climb all the Munros in Scotland in the shortest time possible.
He is currently raising funds for the David Gemmell Living Memorial Fund. The Fund is attempting to raise £200,000 towards L’Arche homes in Edinburgh and Kenya. Father Gemmell, who died suddenly aged 54 in 2008, was chaplain to the school for a short time.