Tai Rom Yen National Park

Tai Rom Yen National Park covers about 425 square kilometres of forested hill country in Ban Na San district, Surat Thani province, roughly 48 km from Surat Thani city via Highway 4009. The name means, loosely, “cool shade in the south” — it comes from the government amnesty program of the same name that ended a communist insurgency centred on this exact hill country through the 1980s. Khao Chong Chang, inside what is now the park, was a stronghold of the Communist Party of Thailand; former guerrilla bases known as Camp 180 and Camp 357 stood in the area before the rebellion wound down. The park itself was established on 31 December 1991, once it was considered safe to reopen to visitors, and named after the amnesty rather than any natural feature.

The main draw today is Namtok Dat Fa, the park’s largest waterfall and reportedly the tallest in Surat Thani province — an eight-tier cascade dropping around 80 metres down a sheer limestone face. The lower tiers are an easy, well-marked walk from the parking area, with a swimming pool at some levels. Getting up to the higher tiers (four through eight) means steeper trails and stretches of wading through the stream, and park staff recommend hiring a guide for that section rather than pushing on alone. The park holds five waterfalls in total, plus a large cave system, and wild elephants move through the interior — a reason to stick to marked trails and heed any ranger warnings about elephant activity.

Insider Tip: Visit Dat Fa in the rainy season (roughly June–October) if you want the waterfall at its most dramatic, when the full eight tiers run with water. Trade-off: trails get muddier and leeches turn up in the wetter stretches, so wear proper boots and check for leeches afterward.

Watch out: There’s no public transport to the park entrance, and mobile signal is patchy once you’re off Highway 4009 — download offline maps and let someone know your plan if you’re heading beyond the lower waterfall tiers.

Pack insect repellent, sturdy boots, and enough water — facilities beyond the park office and basic trailheads are minimal. Kaeng Krung National Park and Khao Sok National Park are the two comparable forest parks elsewhere in Surat Thani if you want to build a multi-park itinerary; see the Surat Thani destination guide for the rest of the province.