The Municipality of Pachuca de Soto, or Municipality of Pachuca, is one of the Municipalities of the state of Hidalgo, located in east-central Mexico. The municipal seat is the City of Pachuca de Soto (Ciudad de Pachuca de Soto). The Municipality of Pachuca is increasingly co-extensive with the metropolitan area of Pachuca, as development has grown to cover over 60% of the geographic open space. That has eliminated much of the municipality's native flora diversity and larger fauna. From Wikipedia