Staff at the station were moved by the stories of two girls - Beau, five, from Liversedge, and Eden, seven, from Holmfirth - whose families have been raising funds to enable them to undergo costly treatment in the USA for neuroblastoma – a form of childhood cancer.
The gruelling David Goggins Challenge, named after the American ex-Navy seal and ultramarathon runner who designed it, involves running four miles every four hours over 48 hours.
The 26 West Yorkshire Fire and Rescue Service staff taking part aim to raise £10,000 for Solving Kids Cancer – the charity that supports those who suffer from neuroblastoma.
Members of Cleckheaton’s White Watch, Green Watch and Blue Watch each completed the 48-hour mission over the last week, with Red Watch embarking on the challenge at 8am on Friday, April 1, following their night shift.
Cleckheaton Station Commander John Bates said: “When the David Goggins Challenge was suggested, there was an overwhelming response, as there has been from the rest of the wider community, with the majority of our station volunteering to take part.
“The three shifts that have already run have really pushed through the pain barrier and are pretty battered and bruised!”
“This really has been a sterling effort by them and a massive team effort.
"We just wanted to do something that was particularly difficult to try and raise as much money as possible for the girls and other children with neuroblastoma.”
The station will also hold a car wash on Saturday, April 2, outside the station from 10am to 4pm, with all proceeds from that being donated directly to Eden who has yet to reach her target, with Beau having already reached hers.
Because of injury, one staff member completed the challenge on a rowing machine, rowing 10,000 metres every four hours.