The Laà (or Làa , Lar , Laar , Larr ) is a left affluent of the Gave of Pau, with Holy-Suzanne (Orthez), between the Geü and the Gave d' Oloron. One gives to his course the higher name of Larrus .

Etymology

Laà , in the past Lar , is the evolution Gascon Basque larre “moor”. Its valley was called Larbaig .

Larrus is the same affected name of the diminutive suffix - CPU .

The commune of Laà-Mondrans owes him its name.

Geography

The Laà is born in the east from Ogenne-Camptort, then runs out in the North-West towards Orthez.

Departments and crossed communes

• Yrénées-Atlantiques: Laà-Mondrans, Lagor, Loubieng, Lucq-with-Béarn, Maslacq, Sauvelade, Vielleségure.

Principal affluents

• (G) the Salt boxes , with Sauvelade, of Vielleségure

• (G) the Laàs or brook of Mesplaterre , upstream of Loubieng
• (D) the Dry Arrieu of Castetner
• (G) the Ozenx , of Ozenx-Montestrucq
• (G) the brook of the mills of Hospital-to Orion and Lanneplaà