Minor cross-border points are Sing Khon,[3] near Prachuap Khiri Khan, as well as Bong Ti and Phu Nam Ron west of Kanchanaburi.

Southwards on the western side, the Ye, Heinze, Dawei (Tavoy), Great Tenasserim (Tanintharyi) and the Lenya rivers are relatively short and flow into the Andaman Sea.

[16] The Tenasserim Hills form the habitat for a number of endangered species, including the Gurney's pitta, endemic to Thailand and Burma, as well as the Asian elephant and tiger.

[27] This range forms a natural border between Burma and Thailand, but it was crossed in 1759 by Burmese troops led by Alaungpaya and his son Hsinbyushin during the Burmese–Siamese War (1759–1760).

The invasion force overran relatively thin Siamese defenses in the coast, crossed the Tenasserim Hills to the shore of the Gulf of Siam, and turned north towards Ayutthaya.

A road was cut across the mountains by Japanese military engineers, but many infantry units crossed the range on foot in an arduous march through the forests and cliffs.

[30] The Australian, British, Dutch, other allied prisoners of war, along with Chinese, Malay and Tamil labourers, were required by the Japanese to complete the cutting of the stretch.

69 men were beaten to death by Japanese and Korean guards in the six weeks it took to build the railway pass, and many more died from cholera, dysentery, starvation, and exhaustion (Wigmore 568).

The chopper had been sent out to recover five bodies of victims of another helicopter crash involving a Bell UH-1 Iroquois, that had occurred two days earlier while looking for illegal loggers in Kaeng Krachan National Park near the Burmese border west of Phetchaburi.

[31] The Black Hawk helicopter crashed near 978 m high Yage Taung mountain in the Tanintharyi National Park zone in Burma, close to the border with Thailand.

[33] Superstitious people blamed the three consecutive crashes on the fact that, according to Thai folklore, the densely forested mountains of the Tenasserim Range have strong guardian spirits.