The XIII Trail do Sor is a trail running event held on September 6, 2026, in Ponte de Sor, Portugal. It features multiple distances: a Long Trail of approximately 31 km, a Short Trail of about 17 km, and a Mini-trail of approximately 10 km, which can be run or walked. A Trail Kids event is available for children aged 5 to 13. The event is open to various age groups with specific requirements for each distance. It is part of several national and district trail running circuits, including the National Trail Circuit, National Trail Sprint Circuit, and the Youth Trail Circuit. The marked routes traverse the Sor River area, incorporating natural obstacles, hills, and valleys, offering a technical challenge amidst natural landscapes. The event fosters a competitive yet inclusive atmosphere, with categories for youth and adults, team competitions, and awards for different age groups and overall winners. A walking option is available, promoting broad participation.