About This Race
The 21K distance serves as the perfect introduction to Trail 100 Andorra's demanding Pyrenean terrain, offering newcomers to mountain ultrarunning their first taste of serious alpine challenge without the full commitment of the longer distances. This half-marathon distance captures the essence of Andorran trail running with significant elevation gain that tests runners' climbing and descending skills across the principality's characteristic steep valleys and ridgelines. Ideal for runners transitioning from road half-marathons or those seeking a manageable yet authentic mountain experience, the 21K provides enough distance to develop race tactics and fueling strategies while remaining accessible to those building toward longer UTMB World Series goals.
Notable Features
As part of the UTMB World Series, this race offers runners the opportunity to earn Running Stones and contribute to their UTMB Index while exploring the unique cultural and natural heritage of Andorra. The event features the official support of NAAK nutrition and provides a comprehensive supporter network with designated hot spots throughout the mountain courses.