Rainy season end September. We went in twice. First time on our own, good experience, we saw several animals, including gibbons, deers, monkeys, something similar to an alligator, hornbills and other birds. The second day we wanted to do one of the trails with a ranger. It was an awful experience, not to recommend. Firstly, it was extremely muddy and there were lots of water since the day before it rained a lot. We weren't told about it at the Visitors Centre and there we went with the guide they gave us. It seemed he was only interested in finishing the trail, walking at a great speed without checking whether we could follow him or not. Almost no explanations. Very bad professional. He even proposed to take us to another place in the park to see some animals, but paying him 700 Baths.

This park has got very good views, lots of animals and birds, hornbills, snakes, monkeys, elephants and other exotic species. We spent a very lovely day there and enjoyed Sai Sorn reservoir and Haew Narok waterfall. We were lucky not to face leeches at all. :)

When l joined G4Fun group in the early years, the routine format was a golf game every day. Recently, our Captain has slotted in one day for non golf Khao Yai is a must for all enthusiasts of heritage national parks. National parks exist in almost all countries. The variety is diverse. For the Khao Yai national park the options vary from simple visits to more elaborate ones requiring 2 or more days. The tour agency looking after us planned a half day visit. We started from the hotel at 9am and came down to the base at 11.30am. The group took 2 vehicles seating total 34 people to tour the site.We made 3 stops. First stop at the Heritag centre, then reservoir and waterfall.Skip the reservoir. Can also skip the waterfall unless you have never seen a waterfall. I counted 115 steps down to the waterfall so this is definitely a no no for those that are not physically fit.The bus ride from base to top is about 45min. In Sep 2013, a sister park agreement was signed by Khao Yai National Park with Great Smoky Mountain National Park of the US. This is a world heritage site, a must for supporters of sustainable forest conservation.

Well worth the entry fee to take your time soaking in the scenary and wildlife. It just has to be a beautifully serene place to visit and would highly recommend to anyone. So many photograph opportunities and the only downside for us was having a four old son which meant for safety reasons it was not advisable to go to the waterfalls. But that did not detract anything from our time there.