Istria 100 by UTMB

About this event

Istria 100 by UTMB brings world-class trail running to Croatia's stunning Istrian peninsula. Based in the coastal town of Umag, the event offers five distances that explore the region's forested hills and Mediterranean landscapes. The shorter 21K route provides a gentle introduction with minimal elevation, perfect for newcomers wanting their first taste of trail running in a supportive environment. More experienced runners can tackle the challenging longer distances, climbing through ancient woodlands with glimpses of the Adriatic below. The event combines Croatian hospitality with UTMB's renowned organization, creating a welcoming atmosphere whether it's someone's first trail race or their latest adventure. Spring timing means mild temperatures and wildflowers dotting the trails.

Distances

Scenery