Tolosaldeko 2 Tontorrak (T3T)

Tolosaldeko 2 Tontorrak (T3T) is a mountain marathon that traverses the Tolosaldea region, featuring the Ernio, Uzturre, and Erroizpe/Larte massifs. The course covers approximately 43.6 km with an elevation gain of +2878 meters, incorporating trails, rocky technical sections, and some asphalt stretches. Participants can expect five checkpoints and seven aid stations along the route.

The event is designed for runners with medium to high difficulty levels, attracting around 350 participants. The marathon emphasizes both competitive spirit and the beauty of the mountainous landscape, making it a notable event for trail running enthusiasts. Visit the organization's website for the most recent information.