Grutas del Rosario, Natural cave system in Lerdo, Mexico.

Grutas del Rosario is a cave in the municipality of Lerdo, Durango, Mexico, at an elevation of 1,879 metres. The surrounding terrain is mountainous, rising to 2,487 metres about one kilometre to the northeast, and the small town of Mapimí lies 18.8 km to the south. The climate is arid, averaging 21 °C, with June the warmest month at 30 °C and January the coolest at 12 °C.

Workers searching for phosphorite deposits discovered the cave system in 1966 when an unusual hollow sound in the rock wall caught their attention. This accidental finding led to exploration and eventual opening to visitors.

The name refers to the Rosario shrine, from which the caves take their name; the site lies in the municipality of Lerdo, Durango, about 19 km north of Mapimí. The surrounding land is scrub-covered mountain country, and the caves sit at roughly 1,879 metres above sea level.

Visitors must explore with an expert guide since the passages are steep and artificial lighting is necessary for safe navigation. Sturdy footwear and caution are important, especially on the uneven surfaces in the deeper sections.

The cave lies in the municipality of Lerdo, Durango, about 18.8 km north of Mapimí, at an elevation of 1,879 metres. The surrounding terrain rises to 2,487 metres within a kilometre to the northeast, and the landscape around the entrance is scrubland.