The 4º Trilho Termal is a trail running event taking place on September 28, 2025, in Termas do Carvalhal, Castro Daire, Portugal. The event offers an 11.4 km competitive trail run, a 9 km walk, and youth races with distances ranging from 1.15 km to 3.45 km, open to athletes and walkers of all ages and levels, including federated and non-federated participants.

This race is part of the “(PER) CORRER CASTRO DAIRE” 2025 series, attracting a diverse group of runners and walkers. The trail features natural terrain with a total elevation gain of 460 meters for the main race, providing a challenging and scenic course through the local landscape.

The atmosphere is inclusive and family-friendly, with events for young runners and walkers. The competition fosters a community spirit and includes individual and team classifications with awards for top finishers and teams, making it a festive event for both competitive athletes and casual participants.