Danielle Richardson and Faye Carroll, who work for Direct 365 in Skelmersdale, decided to take on the fundraising quest after receiving a company email asking for volunteers to take part in the Brecon Beacons Trekfest.
The couple will be doing the walk in aid of Together for Short Lives, the leading UK charity for all children with life-threatening and life-limiting conditions and all those who support, love and care for them.
Danielle, 27, from Ormskirk, said: “Neither me nor Faye have done anything like this before so when the opportunity arose through work we jumped at the chance.
“Personally, I’ve always wanted to do a big charity challenge and thought this would be a great one to undertake.
“Trekfest takes place on the first weekend in June and we’re planning lots of training.
“We’ve already been on several hikes around the country and are planning to take on the Yorkshire Three Peaks and the Lancashire Four Peaks before June.
“We’re also looking into doing some walking at night time when it’s dark because we’ll need to know how to face that.”
During the Trekfest challenge, the girls will have to walk continuously for 24 hours. There will be several check points along the way where they will be able to rest and eat, but only for a short time.
The pair are hoping to raise around £1,000 for the charity, whose nearest local centre is Derian House, in Bolton. Direct 365 have also promised to match-fund any money raised.
Danielle said: “We’re both nervous, but pretty sure we can do it. All our friends, family and work colleagues are all behind us.”
To sponsor the pair, visit: mydonate.bt.com/fundraisers/ peakstrekfest