Few studies have explored the impacts of costs on serious leisure careers. This article presents a case study of amateur athletes encountering a significant cost-cancellation of the 2012 Ironman New Zealand triathlon-and how they persevered despite this cost. Through a phenomenological research design incorporating qualitative interviews with 14 amateur triathletes, grounded theory analysis revealed that despite encountering a significant cost, athletes remained committed to their serious leisure careers. Athletes acknowledged and accepted the inherent risk of cancellation associated with outdoor sports events. Their experiences stimulated deployment of cognitive and behavioral strategies aimed at rationalizing or mitigating risk. This article contributes three theoretical propositions regarding costs encountered by serious leisure amateurs, how they persevere around costs, and concomitant impacts on serious leisure career trajectories.