To what extent does local LGBT+ activism have impacts beyond its immediate surroundings? We offer a theoretical framework emphasizing how a combination of local movement visibility and LGBT+ cultural receptivity can account for disseminating influences of LGBT+ activism. We illustrate our framework in part through an analysis of the potential diffusion of LGBT+ support in Bosnia in the aftermath of the country’s first-ever Pride. Our model explains why the 2019 Sarajevo Pride increased LGBT+ support locally but had no immediate effects on attitudes in greater Bosnia. It also explains why LGBT+ support has since expanded beyond the capital to Bosnia’s surrounding regions in a follow-up 2021 study. Even when local LGBT+ visibility is low or nonexistent, underlying cultural receptivity can be conducive to the gradual diffusion of LGBT+ support. Moreover, the challenging circumstances of the pandemic did not undermine the expansion of LGBT+ tolerance across Bosnia. Our findings illustrate the persistent power as well as limitations of LGBT+ activism to usher in downstream cultural change.