It is named Nam Pong National Park after its source called Nam Pong River which flows to be kept in Ubonrat Dam (also named Nam Pong Dam in the past). It is a national park, in accordance with the suggestion of Khorn Kaen Province, called in the past “Nam Pong – Phu Meng” because some of its parts are in Phu Meng Mountain Range. Nam Pong National Park, located in the west part of Khorn Kaen Province and close to Ubonrat Dam, is in the National Forest Reserve such as Soke Tae Forest, Phu Meng Forest, Koak Luang Forest, 3RD Cluster Koak Luang Forest, Phupadum Forest and Phupadang Forest in Ubonrat District, Banfang District, Nongriar District, Manjakiri District, and Koak Po Chai Sub-amphur, Khorn Kaen Province. And some areas are in Baantan District and Gangkor District, Chaiyaphum Province. It is about 197 square kilometers or 123,125 Rais.

Topography
The Park generally consists of sandstone mountain range, located above sea level and similar to the most mountain ranges in North Eastern Thailand. The mountain range, lying from north to south along with Ubonrat Dam, is the source of main rivers, for examples, Pong River, Shirn River and She River. Its north part is in Phupankam Mountain Range, and its south part is in Phu Meng Mountain Range. In the west side of the Park is alternately steep mountains and erected cliffs, some of which are in contact with the reservoir below. And in the east part of the park is a vastly plain area at the foothill which is about 600 meters above sea level.

Flora and Fauna
80% of the Num Pong National Park consists of deciduous forest which has mixed forest and grassland forest scattered everywhere. In the middle of the park, both Phupankam Mountain Range and Phu Meng Mountain Range, is productively semi-evergreen forest which is the source of streams flow to Ubonrat Dam. Not only wild animals live, but also have many important kinds of herb derive from this area. The valuable plants generally found are Siamese Sal, ingyin, Dipterocarpus obtusifolius, Ivingia malayana, iron wood, and shrubbery such as wild cycad, climbing plant, and many kinds of herb and prickly plant.

Most of animals found live in semi-evergreen forest in Phu Meng Mountain Range which is productive and rarely disturbed by man, and are medium-size and small-size animals, for examples, wild boar, barking deer, wolf, porcupine, pangolin, hare, jungle fowl, snake and many kinds of bird.