Six airport firefighters will tackle the UK's three tallest mountains to support their colleague's charity, Soccer Stars Juniors, which supports children with disabilities.
Ross Aley, Curtis Monks, Jack Langford, Mark Ray, Neil Harvey, Marcin Mietelka and Alan Bertram will face Snowdon first, on 11 September, climbing 1,085 metres, before heading north to Scafell Pike in the Lake District.
Their second mountain of the day will be a little smaller, at 978 metres, but by no means less of a task.
Finally, the men will arrive at Fort William, following a six-hour, overnight drive, to tackle Ben Nevis, which stands at 1,344 metres tall.
The Three Peaks Challenge is done in 24 hours, making this no easy feat.
One of the firefighters, Jack Langford told Channel 103 they wanted to surprise their colleague by doing this for the charity he created to help children with disabilities play football.
"Everyone should have the same opportunity, our colleague Mark Ray set up Soccer Stars, he used to play football for Leeds, he and another colleague give their [Saturday] morning to help children with learning difficulties who might not be able to partake in mainstream football clubs.
"It gives them the opportunity to feel like they're part of a team and getting the same experience as everyone else."
With their hearts in the right place, they have been training to get their heads there too.
Jack says their jobs already expect them to have a certain level of fitness, but they have been taking it that extra step further.
"We're all getting pretty excited now, it's come around quite quickly.
"We booked it earlier in the year, as a bit of a challenge and something to keep us motivated and fit at work.
"We're really looking forward to it, in recent weeks we've been getting out on the North Coast to simulate the elevation and trail walking.
"We're quite taken back by the amount of support, and it has become quite recognised in the last week or two, so we're really chuffed."