Tresviso is a municipality located in the autonomous community of Cantabria, Spain. The municipality is located 907 m (2,976 ft) above sea level within the Picos de Europa of the Cantabrian Mountains. The village is located on a mountain ledge approximately 800 m (2,600 ft) above the Deva River valley bottom. Despite being in Cantabria, the only road access to Tresviso is a narrow road over a 1,320 m (4,330 ft) high pass from Sotres in the neighbouring province of Asturias. Alternatively, on the Cantabrian side there is a strenuous 3-hour hike from the N621 highway along the Deva featuring many switchbacks.