The Istria 168k represents the epitome of endurance challenges within the Istria 100 by UTMB® event, taking ultrarunners through the mesmerizing landscapes of Istria, Croatia. The course provides a rigorous challenge, unfolding across 168 kilometers of varied terrains such as thick forests, verdant meadows, medieval towns, and along the sparkling Adriatic coastline, boasting an elevation gain of approximately 7,300 meters. Participants, whether elite ultrarunners or passionate trail enthusiasts, are drawn to its stunning natural beauty, as well as the tangible history encountered along the route, through ancient structures and storied locales. Completing the Istria 168k not only offers a deep sense of accomplishment but also delivers a poignant journey through the rich tapestry of nature and culture embedded in the Istrian peninsula.