The physiography of the Pallars natural region includes the Noguera Pallaresa river basin with its tributaries. The region encompasses as well as the mountain ranges spanning the Pyrenees and Pre-Pyrenees area that surround the basin until the Serra del Montsec which forms the limit of the Pallars at its southern end.[1][2]
Municipalities
In present times the most important town of the Pallars is Tremp.
In 1936 the Pallars was split into the Pallars Jussà and Pallars Sobirà present-day administrative divisions. The historical Ribagorça territories administered by the Generalitat de Catalunya were added to the newly created Pallars Jussà comarca.[4] In 1990 the Ribagorça area was segregated from the Pallars Jussà comarca and was established as the Alta Ribagorça.[5]