T. B. Long

Sustainable entrepreneurs operating in protected areas face distinctive barriers that place additional emphasis on the need to build legitimacy. To date, how they do this has not been entirely explored. This paper addresses this need through an exploratory study of sustainable entrepreneurs in a transnational protected area. The results indicate that sustainable entrepreneurs in protected areas face barriers that can be broadly classified as cognition spanning, locale and sector‐related barriers. The findings highlight that a key way sustainable entrepreneurs overcome these distinctive barriers is by building legitimacy through activism. Activism became instrumental in building legitimacy with varied stakeholders and actors. This is all geared towards overcoming barriers during the sustainable entrepreneurship process. The findings add to existing literature on the role of legitimacy building in sustainable entrepreneurship by detailing the different forms of legitimacy and how they are built through activism. The paper concludes with propositions about the conditions necessary for sustainable entrepreneurs to build legitimacy in fragile socioecological contexts through activism.