Amplifying this year’s 30th anniversary edition of The Guelph Jazz Festival (GJF), the improvisation community will gather to reflect on, share, and celebrate the significance and impact of this unique and award-winning world-class event. In this “third decade,” a nod to a 1984 recording by former GJF performers The Art Ensemble of Chicago—a group that has left its own indelible mark on the history of jazz—we pause to consider the vital role that this home-grown community-based event, the Guelph Jazz Festival, has played in shaping the Canadian (and, indeed, the international) musical landscape. We also consider the various ways the Festival has helped to usher in new ways of imagining and conceptualizing the power of improvisation as both a musical and a social practice. It is in this spirit that, for this year’s edition of The Guelph Jazz Festival Colloquium, we convene a series of special panels involving former and current GJF performers, affiliated researchers, jazz journalists, and community voices to recount their relationships and experiences with The Guelph Jazz Festival. How, these panels will ask, do we understand the Festival’s legacy, and how might we reimagine that legacy in the future? Beyond innovative and international programming and critically-acclaimed performances, the GJF has also significantly provided the foundation and fertile ground for expansive educative endeavours and initiatives—such as the Guelph Jazz Festival Colloquium itself and the formation of international scholarly networks and institutions—that continue to benefit musical and scholarly communities worldwide.