Most of Namtok Khlong Kaeo National Park area is a relatively uncomplicated mountain range of the Banthat Mountain Range, consisting of Khao Kaeo, Khao Ta Bat, Khao Ta Chot, and Khao Kamphaeng. The peaks of the mountains form the Thai-Cambodian border, at approximately 100 to 836 meters above sea level. The highest peak is Khao Bat Summit, which is at 836 meters above sea level. The geography causes the formation of many streams, such as Khlong Luek, Khlong Ang Puk, Khlong Kaeo, Khlong Ta Bat, Khlong Hin Phloeng, Khlong Lue, Khlong Ka Chai, and Khlong Mala Ko, flowing into Khlong Sato and out into the sea.

         This area is influenced by tropical southwest and northeast monsoons. Additionally, due to the fertile forest environment, it rains profusely throughout the year. It can be divided into seasons as follows :
- Summer starts in February to April.
- Rainy season starts from May to October.
- Winter starts from November to January

Flora and wildlife

       The area is generally covered by an evergreen forest plant community with high humidity which is a watershed for many streams and creeks. This dense forest is made up of a variety of plant species, ranging from small undergrowth plants to large canopy trees ranging in height from 25 to 60 meters. The predominant plants are Rubber, Shorea hypochra Hance, Anisoptera costata Korth., Iron Wood, Malva Nut, Heritiera javanica Kosterm, Aphanamixis polystachya (Wall.) R.Parker, and Black Rosewood. The shrubs and undergrowth plants commonly seen are those of the ginger family, Rattan, Salacca, various Betel Nuts, Bamboo, Caryota urens, and Fishtail Palm. Additionally, the rare and stunning orchid, "Leung Chan", can be seen throughout the National Park. 

       The area is a natural vibrant forest, which means that wild animals abound, which can be seen at various water sources. In this area, a large number of leeches are found, which indicates the excellent condition of the forest. As found in the surveys and inquiring people in the area, the critical wildlife found are Deer, Tiger, Barking Deer, Wild Boar, Bear, Mouse-Deer, Gibbon, Monkey, Langur, Squirrel, Civet, Palm Civet, various types of Pheasant, White-rumped Shamas, Common Hill Mynas, Falcon, Bulbul, Laughingthrushs, Hornbill, Lineated Barbet, multiple types of Snake, Giant Lizard or Langur, Cyrtodactylus intermediuses, Flying Gecko, Flying Lizard, Monitor Lizard, Turtle, Blyth's Frog, Green Frog, Toad, Common Tree Frog, and Spiny Rock Carb. In addition, around streams and waterways, there are also abundant fish, such as Soro Brook Carp, Siamese Rock Catfish, Jullien's Mud Carp, Gouramies, Red-tailed Snakehead, and Botia.