| Mountains of Sis | |
|---|---|
 The Mountains of Sis seen from the south | |
| Highest point | |
| Elevation | 1,791 m (5,876 ft) |
| Listing | List of mountains in Aragon |
| Coordinates | 42°24′41″N 00°38′39″E / 42.41139°N 0.64417°E |
| Geography | |
  Mountains of Sis Location in the Pre-Pyrenees area | |
| Location | Ribagorza (Aragon) |
| Parent range | Pre-Pyrenees |
| Geology | |
| Mountain type | Conglomerate |
| Climbing | |
| Easiest route | Drive from Beranui, Sopeira or Arén |
The Mountains of Sis (Catalan: Serra de Sis, or Serra del Cis; Spanish: Sierra de Sis) is a 28 km (17 mi) long mountain range of the Pre-Pyrenees. They are located between the valleys of rivers Isábena and the Escales Reservoir, Noguera Ribagorzana, in the Ribagorza comarca, Aragon, Spain.[1] The ridge's highest summits are Pico de l´Amorriador (1791 m) and Puialto (1782 m). Other important summits are 1765 m high La Creu de Bonansa, 1490 m high Altaió d'Aulet and 1066 m high Tossal de Cornudella.