(2.279 ha), (1986). It`s situated in Guanacaste province,
to the north from Palo Verde National Park, on a plateaux ended in rocky cliffs that climb to 125 metresabove the basin of river Tempsique. It stands out of large number of
insects, especially bees and wasps, that live in the most shapely riporio forest
in the region.
70 % of stands are covered by decideous forests (mahogany,
gumbo-limbo, rosewood and cannonball trees). There are also yellow Cortez trees that on March burst
into bloom for four days and are completely covered with yellow flowers. The reserve provides
shelter for collared peccaries, white-nosed coatis, howler and white-faced
monkeys and jaguarundies, rattlesnakes, boa constrictor, coral
snakes. Its name means "bearded hills" for the mosses that drape from the branches. During dry season the temperature can reach even 40 C. In
1994, a large part of reserve was destroyed by fire.