Piedras Negras District

Piedras Negras is a district of the Mora canton, in the San José province of Costa Rica.

Geography
Piedras Negras has an area of 14.84 km2 and an elevation of 505 metres.

Demographics
For the 2011 census, Piedras Negras had a population of 379 inhabitants.

Road transportation
The district is covered by the following road routes:
 * CR RNS 136.svg National Route 136
 * CR RNT 316.svg National Route 316