People from all over the state will show their support for Cystic Fibrosis sufferers at the Great Strides SA Walkathon.
There will be two walks, one at Henley Square and another at Strathalbyn Park.
Walkers who fundraise for Cystic Fibrosis SA will get free registration and a free t-shirt.
The Great Strides SA Walkathon is on 21 March.