Serra de d'Esparreguera or Serra Esparreguera[1] (Spanish: Sierra de Esparraguera,[2] although the spellings Sierra de Espaneguera or Sierra Espaneguera are common in many maps[3]) is an over 17 km (11 mi) long mountain range in the Alt Maestrat comarca, Valencian Community, Spain.

This mountain chain rises abruptly from a plain and looks quite impressive from certain angles.

It extends in a roughly SW-NE direction between Atzeneta del Maestrat and Albocàsser.

Its highest point is 1087 m high Esparreguera; another important summit is Morral Blanc (1060 m).

These mountains are frequently covered in snow in the winter.