The construction of victims’ collective memory in post-conflict Colombia is crucial to understanding the violent past and its social consequences. This article argues that victims’ initiatives, such as the March of Light, are facilitating an active role of local communities in the configuration of their memory regimes after the war. Addressing a participative action research approach, this article’s significance rests in the idea that Colombian victims’ groups from Eastern Antioquia are establishing three particular types of collective memory developing the March of Light every week. It establishes that this effort is a powerful instrument to claim truth and reparation in Colombia, helping the ongoing process of transitional justice in the country. It demonstrates that the tension between official and non-official narratives of collective memory is an essential part of transitional justice scenarios in which the clash of values defines positions of power, visibility and recognition inside contexts of social transition.