In 1940, 2 years after the foundation of the nearby town of Tingo Maria, some forest areas were spared from human development to create a new protected natural area. In 1950, during the dictatorship of Manuel A. Odría, a protected area called Cueva de las Lechuzas National Reserve was created in the area of the futurenational park. On May 14, 1965, Tingo Maria National Park was established by Law No. 15574, which stated that the area include the Bella Durmiente massif, the cave named Cueva de Las Lechuzas and adjacent forests. However, the law didn't specify the total area or the boundaries of the park. In 2000, boundaries were defined and the total area was fixed at 4777,8 hectares.
Geography
Topography in the park is steep and mountainous, because the Bella Durmiente massif occupies almost of its entire extension. Elevations in the park are in the range of 650–1808 m; rocky walls of 300–500 m in height are common. Soils are calcareous, rocky and thin, and landslides due to natural causes or past attempts of agriculture do occur. Tingo Maria National Park is located at the confluence of the rivers Huallaga and Monzón. Due to the calcareous nature of the mountains, several rivers in the park have eroded the rock to form underground courses.
Climate
The rainy season in the area goes from October to April, with a mean annual precipitation of 3300 mm. Access to the park in that season is limited due to weather conditions. The annual temperatures in the area have a maximum of 29.8 °C and a minimum of 19.2 °C, being the annual mean 24.5 °C.
Ecology
Flora
Vegetation in the park is characterized by the presence of very humid montane forests frequently covered with mist, and trees covered with epiphyte plants, mosses and lichens due to humidity. Among the most notable plant species in the park are trees like cedro colorado, palo blanco, cumala blanca, cumala colorada, quinilla, sapotillo, tulpay and lagarto caspi ; palms like huasaí, ungurahui, pona, yarina and palmiche ; tree ferns and numerous orchids, being the most frequent Phragmipedium spp..
Environmental issues that affect the biodiversity of this national park are: the extraction of wood for construction or fuel; the clearance of forest for agricultural crops, coca and pastures; uncontrolled tourism; hunting; fishing with toxins and explosives; the noise of helicopters departing from a nearby airbase; obstruction of an underground river due to debris from deforestation by nearby villages; and the extraction of gravel and other construction materials.