Bluebirds Unite hope to see their biggest gathering of fans tomorrow who still want the club to play if blue.
The group have called on supporters, wearing the clubs traditional colour of blue, to walk from Cardiff Castle to Cardiff City Stadium ahead of tomorrow's huge match with Manchester City.
Organiser Sian Branson, who founded Bluebirds Unite, said
“A club has its colour and badge. Players, managers and owners will come and go but, ultimately, that is what the fans will follow.
“This is not a march against the club; it’s rather an opportunity for the fanbase to show what it means to us.”
Already the group have taken out a full sized billboard near CCS and tomorrow's march will take those marching past the giant advert as they approach Cardiff City Stadium.
'All roads point to the 25th August 2pm Cardiff Castle', Branson posted on Facebook.
'This is what the last couple of months have been leading to. Our best chance to make a statement with lots of people dressed in Blue.
'There may never be another chance to do this...... We've put the work in all you need to do is don blue, turn up and bring as many people as you can.'