Everyone on the march wore blue because that is Ms Jourdan's favourite colour. Ms Jourdan went missing from the Caboolture area on 13 July, 2012.
For more information on Ms Jourdan's disappearance including an extended interview with her family - follow the links below this video.
If you have any information, contact Crime Stoppers on 1800 333 000.
Related videos:
SHARE THIS! GRAVE FEARS for Sandrine Jourdan - Please help get the word out!!! - http://www.youtube.com/watch?v=QtKqThkGNXo
PLEASE HELP - SANDRINE JOURDAN - CARE & SHARE -http://www.youtube.com/watch?v=v8X5hVY-RAQ