Despite the good effort from park officials, the illegal logging of rosewood is still a problem in the national park from time to time, but not as much as in the neighbouring Pang Sida and Thap Lan national parks. Poaching with the fragrant wood species like sandal- and aloe woods are a bigger problem in the park, traces of poaching can be found off the common trails in some areas.
According the World Heritage Committee's 38th session (Doha, 2014), the illegal logging of Siamese rosewood (D. cochinchinensis) and other trees are escalating both in intensity and violence in Dong Phayayen-Khao Yai Forest Complex.
The paved and well maintained roads results in visitors and park officials driving well above the 60km/h speed limit, which is already too much for a national park. During our multiple visit to the park we have seen park rangers driving above 80 km/h.
Run over by cars, dead or injured snakes is a common sight on the roads, sadly injured pythons are seen far too often. Visitors we have spoken to has seen macaques carrying dead babies killed in accidents, others seen injured adults. We have seen too many times that park rangers and visitors not slowing down when they approach macaques on the roads, driving by very careless, nearly hitting them.
While the high speed issue is an ongoing major problem, we have heard stories from some visitors that they got fined for stopping to see wildlife, like gibbons, macaques and hornbills.