Istria 100 by UTMB

The Istria 100 by UTMB is one of the most scenic races in the UTMB World Series, set along the Adriatic coast of Croatia. Starting from the charming town of Umag, runners traverse the Istrian peninsula on trails that alternate between rocky coastal paths and lush inland forests.

The course passes through medieval hilltop villages, ancient olive groves, and vineyards, with constant views of the turquoise sea. The terrain is varied: technical rocky sections give way to smooth singletrack through oak and pine forests.

Istria is a region where Italian and Croatian cultures blend seamlessly, and that richness extends to the race experience. Aid stations feature local delicacies, and the atmosphere is warm and welcoming. Whether you are chasing a UTMB index or simply exploring one of Europe's hidden gems, Istria 100 delivers an unforgettable journey.