Kowyai Yai National Park of Thailand has many mountains that are very complicated like the Khao Rom it is the highest peak and the height is measured around 1,351 meters, height of the Khao Lam peak is around 1,326 meters, height of the Khao Keaw peak is around 1,292 meters, height of the Khao Sam Yod is around 1,142 meters, height of the Khao Far Pha is around 1,078 meters, height of the Khao Kampang is around 875 meters, height of the Khao Samor Poon is around 805 meters and the height of the Khao Kaew is around 802 meters that are  above the sea level. Furthermore, the region has an immense grassy field other than fruitful forest.

There are five important rivers, which are used for an irrigation and agricultural purpose. The listing of these rivers is as follows the Prachin Buri River, the Nakhon Nayok river, which is located in the southern region and is very useful for an agricultural purpose, then comes the Lam Ta Kong River, the Praplerng River, which is located in the northern region, the water from these rivers is required for the cultivation of the Korat Plateau. And the Muag Lek Stream that is situated in the northwest region and water flows to Pasak River that is in the Muag Lek area and is very useful for cultivation and farm animals and the water is available throughout the year.

Now if we observe the climatic position of Kow Yai, there are basically three seasons they are the rainy, cold and the hot season. Rainy season is from May to October, in these months it rains a lot and there is a constant waterfall, and the average temperature would be around 27° C, and after the rain the place seems to be beautiful and admirable. In cold weather that is from November to February, this is the best period for visiting Kow Yai, as cool climate is perfect for hiking and the sunset view is mind blowing. In the day, the temperature is around 22° C and in the night the temperature drops it can be around 10° C and the hot climate starts from March and remains until April, this weather is mainly dry and the view of waterfalls is not available in April, as the water flow is very less. The temperature keeps varying between 20° C- 30° C. In summers the place is less attractive due to dryness and humidity.