Given that sport tourists usually come to sporting events in groups and are exposed to multiple types of stimuli, the influence of sport tourists' nostalgia on their attitude or behavior can be more complex than in other settings. Thus, this study explored how sport tourists' nostalgia toward a sporting event shapes their intentions to engage in related activities when their attitude toward the event functions as a mediator. To this end, data gathered from U.S. sport tourists to college football games were analyzed using a multilevel approach. Results showed that the relationship between nostalgia and intentions concerning college football was fully mediated by attitude toward college football at both individual and group levels. Such findings provide evidence for the positive link between nostalgia and intentions in a sport tourism context as well as for the applicability of the Nostalgia Scale for Sport Tourism. •Sport tourists' nostalgia has positive influence on their intention.•Attitude fully mediates the influence of nostalgia on intention.•Nostalgia Scale for Sport Tourism is shown applicable in a college football context.