Troncedo is a small town and mountain pass that is located at 1,009 meters above sea level in the southeastern end of La Fueva, on top of a hill on the slope of the Sierra del Turón from Graus to the Fuevan hollow, but which is currently along the HU-V-6441 road. The most defining characteristic of Troncedo is its castle, of which only the homage tower remains, which is larger than those of other main castles in Sobrarbe (the castle of Aínsa or the castle of Boltaña), which makes one think in the proportions that it could have in its time of use. Due to the importance of the castle of Troncedo, the antiquity of the place is known, since documents have been found since the reign of Sancho el Mayor (first half of the 11th century) that already testify to the importance of defending the county of Troncedo, Sobrarbe as well as the nearby town of Graus, which was still Moorish. In 1797 Troncedo had 150 inhabitants; currently has about thirty inhabitants.
The road from Graus is in very good condition for road cycling, little traffic, good asphalt and steep climbs. On the other hand, on the Trillo side the road can be defined as a paved forest track and has steeper slopes and very tight curves.