Los Mármoles National Park, National park in Hidalgo, Mexico

Los Mármoles is a mountain protected area in Hidalgo spanning multiple valleys and elevation zones. The terrain shifts between dense forests and open areas, with limestone formations shaping much of the landscape.

President Lázaro Cárdenas decreed Los Mármoles a national park on 12 August 1936, and the decree took effect on 8 September 1936. The park was created to protect soil from degradation, maintain the region's climate by conserving or restoring its forests, and use the area's natural beauty and the character of its villages to attract tourists. The decree also provided for improving access roads to local settlements for the benefit of farmers.

The park sits within the Sierra Madre Oriental, a region tied to indigenous trade routes and settlement patterns. Visitors walk through landscapes where local communities historically moved between valleys and highlands.

The area is temperate and humid with summer rains, so visitors should bring water-resistant clothing and sturdy footwear. It helps to check local conditions before arrival and stay flexible with plans.

Cerro Cangandó, the park's highest point at 3,000 m, is known for a natural magnetic needle that deflects hikers' compasses. The park also shelters 11 bat species, among them the common vampire bat (Desmodus rotundus) and the lesser long-nosed bat (Leptonycteris yerbabuenae).