The Trail do Zêzere is a trail race in Ferreira do Zêzere, Santarém District, Portugal, typically held in mid-November. It provides four distances: 14 km, 20 km, 35 km, and 50 km, allowing participants to select a shorter forest run or a long mountain day. Significant climbing is present at all distances: approximately 530 m of gain on the 14 km route, 900 m on the 20 km, 1,830 m on the 35 km, and 2,800 m on the 50 km. Some distances are linked to the UTMB Index, attracting trail runners seeking qualifying results.
The routes traverse technical trails, dense forests, and the area surrounding the Zêzere River. Organizers and race listings characterize the courses as challenging to navigate yet remarkably scenic. The Clube de Atletismo de Ferreira do Zêzere organizes the event, drawing participants from various regions of Portugal, not solely the local vicinity. It is regarded as a significant trail running event in central Portugal, offering sufficient distance choices for novice trail runners, club athletes, and experienced ultra runners to participate during the same race weekend.