The anti-apartheid wisdom of ‘Nothing about us, without us, is for us’, resonates strongly with the commitment of critical participatory action research (PAR) to value knowledges that are historically marginalized and produced through collaboration and in action. In this spirit, this chapter engages with the promises and potential of PAR as a transformative social justice project that is epistemologically and ontologically rooted in democratic participation and critical inquiry and in conversation with social movements. Drawing upon Mestizo Arts & Activism Collective’s participatory research projects, we discuss the role of critical PAR in the struggle for immigration rights.