The Mater Heart Run started in 2002 and happens annually in Nairobi and other towns in Kenya. The run is a fundraiser for children with heart conditions, particularly those from disadvantaged backgrounds who require cardiac surgery or treatment. The Mater Heart Run attracts thousands of participants, including individuals, families, corporate teams, schools, and community groups, from across Kenya. Participants can choose to run, walk, or engage in other physical activities during the event, making it inclusive and accessible to people of all ages and fitness levels. In addition to fundraising, the Mater Heart Run aims to raise awareness about heart disease, particularly congenital heart defects in children, and the importance of early detection, diagnosis, and treatment.