"jungle of the cold lord") is a mountain range in Phetchabun, Chaiyaphum, Lopburi, Saraburi, and Nakhon Ratchasima Provinces, Thailand.

The mountain chain has a length of about 170 km and reaches a maximum elevation of 1,167 m at Phu Khing at the northern end.

The Dong Phaya Yen range divides the Chao Phraya river valley of central Thailand and the Khorat Plateau of the northeast.

These mountains, together with the Sankamphaeng Range at their southern limit, form the Dong Phayayen-Khao Yai Forest Complex, which includes several national parks.

In mid-2016 UNESCO briefly considered placing the Dong Phayayen-Khao Yai Forest on a list of endangered World Heritage sites because Thailand had not done enough to stop illegal logging of phayung (Siamese rosewood) trees.