The McMaster Institute for Research on Aging (MIRA) aims to optimize the longevity of Canada’s aging population through research, education, and collaboration. Interdisciplinary teams work alongside older adults and key stakeholders to find ways that will help Canadians spend more years living well. MIRA also acts as an entry point to some of McMaster’s existing research platforms in aging, including the McMaster Optimal Aging Portal and the Labarge Centre for Mobility in Aging. The Labarge Centre, funded through a donation from Chancellor Suzanne Labarge, places emphasis on mobility, which is a cornerstone of healthy aging. By better understanding the range of health and social challenges associated with mobility in aging, we have the potential to optimize the well-being of Canadians, and reduce related health and social costs.