Trekking
trekking the grasslands is easy, the jungle a bit tougher
There are plenty of trekking trails around the park. There are many short trails for the casual trekker to enjoy the natural beauty of the park. These range from 1 to 9 kilometers. Several of these start at the park headquarters. There is an 8.5km trek from the park HQ to Heaw Suwat Waterfall that also passes a couple of other falls on the way.
For the serious trekking enthusiast, there are some trails into the depths of Khao Yai that will take 3-4 days to complete. You will be going into the depths of the jungle.
You should always inform park rangers before starting a trek. Guides are available at the park headquarters for a small charge.