On Saturday 24 June Ruth Mulvany, who works in the council's Environmental Protection Team, will take part in Race to the King - a fully supported 53-mile ultramarathon challenge.
The breathtaking route starts near Arundel in West Sussex and runs through the South Downs National Park until reaching the climactic finish on the steps of Winchester Cathedral.
Ruth has been training for the run since March and has been joined every step of the way by her dog called Bailey (age 13), who has kept her company for all those practice miles.
Ruth said: “I had never run more than 13 miles before I started my training in March, and I know this challenge will be difficult and one of the biggest physical and mental challenges I will ever face.
“However, when I think about children throughout the world suffering day after day just because of where or what they were born into I know I am privileged to have the choice to run this ultra-marathon, rather than be forced to walk miles each day for clean water.
“Training is going well and I sometimes find it hard to believe I have managed to fit it round everything else, but I’m now determined to finish what I’ve started.
“I have raised more than £700 for Save the Children so far - a charity that does invaluable work both here and across the world where children are in crisis. I really want to raise £1,000 so if you can donate any amount it is greatly appreciated.”
To sponsor Ruth people can visit http://uk.virginmoneygiving.com/ruthmulvany