Sierra Cristal National Park
(Parque Nacional Sierra Cristal) is a national park
. It is located in the southern part of the Holguín Province
. It was the first National Park created in Cuba in 1930, and covers an area of .
It is located in the heights of Sierra Cristal (Cristal Mountains), one of the highest mountain range in Cuba (second only to Sierra Maestra). Cristal Peak (Pico Cristal) reaches an elevation of . Sierra Cristal National Park lies in the municipalities of Mayarí and Sagua de Tánamo.
The ranges are dominated by pine forests. Caribbean Pine
(Pinus caribaea) can reach heights of in this area. The endangered Cuban Soledon
can be found in Sierra Cristal.
A research center established in 1988 in Pinares de Mayarí monitors the ecology of the region.