This mountain chain crosses the arid eastern end of the Monegros comarca from northwest to southeast and divides the basins of the
Gállego and
Isuela rivers. It has numerous ravines and its landscape is characteristic of
badlands. The ridge's highest summits are
Monte Oscuro (822 m) and
San Caprasio (811 m); other summits are
Corona de la Reina (629 m) and
Vedao (548 m), located at the northern end of the range, as well as
Sigena (592 m) and
Huegas (447 m), located at the southern end. This mountain range is named after the town of
Alcubierre, located 3 km east of the range. The Sierra de Alcubierre is divided into subranges, foremost of which are
Sierra de Lanaja, named after
Lanaja town, and
Sierra de Pallaruelo, named after
Pallaruelo de Monegros village, both located roughly in the central part of the main range. ==See also==