Esparza de Salazar/Espartza Zaraitzu Village · Esparza de Salazar/Espartza Zaraitzu, Pirineo, Navarra Esparza de Salazar, on the banks of the Salazar river between 705 and 900 m altitude, is the fourth coldest-wintered village in Navarre, with lows of down to -25°C and summer highs of over 35°C. With 75 inhabitants (INE 2025), its population traditionally spoke a Biscayan variant of Basque, in steady decline since the Civil War. Photo: Joxemai (CC BY-SA 4.0) What to see and do in Esparza de Salazar/Espartza Zaraitzu