El Hiloche, State park near Mineral del Monte, Mexico

El Hiloche is a protected nature area in the Sierra de Pachuca featuring pine and oak forests that border former mining zones. The landscape shows clear traces of past mining activity scattered across the forested mountain slopes.

A decree of 16 December 1996 declared the area a protected natural zone of municipal domain to halt irregular settlements. On 10 October 1998 it became an ecological reserve of 112.27 ha, with an 87.65 ha core. On 6 September 2004 it was decreed a state park of 99.88 ha, and a 2011 decree banned new construction and added 11,708 m² of green areas.

On 5 May 2017 UNESCO admitted the Geoparque Comarca Minera to its Global Geoparks Network, and El Hiloche is one of its 31 geosites. The designation covers the geological, mining, archaeological and cultural heritage of the Comarca Minera, the mining district around Mineral del Monte and Pachuca. The park itself holds no population centre; the municipal seat of Mineral del Monte lies in its zone of influence.

The park sits at high elevation in the mountains near Pachuca and requires planning for steep terrain and changing weather. Sturdy footwear and layers are advisable for comfortable exploration of the forested slopes.

The park's four polygons are bounded by the federal Mexico–Tampico highway, Calicanto dam and the Barrio del Hiloche. Its highest point, Cerro El Hiloche, reaches 2,927 m, and fog is frequent at the start of the rainy season, when 73.7% of the 951 mm annual rainfall falls between June and September.