A better understanding of context facilitates interpretation of intervention success or failure. Perceptions of context may differ across stakeholders. We used concept mapping in case studies of three imminent urban form interventions (a public bike share program in Vancouver, British Columbia; a city-wide cycling network in Victoria, British Columbia; a bus rapid transit system in Saskatoon, Saskatchewan) to uncover stakeholders’ perceptions of factors that influence the success or failure of urban form interventions. Fuller D, Winters M, Kestens Y, Rondier P. A tale of three cities: A concept mapping exercise to understand the context for urban form changes. Oral presentation at: International Society of Behavioral Nutrition and Physical Activity; June 10 2017; Victoria, BC.