Than Sadet–Ko Pha-ngan National Park

{{Short description|National park of Thailand}}

{{Infobox Protected area

| name = Than Sadet–Ko Pha-ngan National Park

| iucn_category = II

| photo = Kpg ts hauptstrand.JPG

| photo_caption = Than Sadet Beach

| map = Thailand

| map_caption = Location in Thailand

| map_width =

| relief = 1

| location = Surat Thani Province, Thailand

| nearest_city = Surat Thani

| coordinates = {{coords|9|45|0|N|100|4|28|E|display=inline}}

| area_km2 = 43

| established = November 2018

| visitation_num = 158,090{{cite web |url=https://portal.dnp.go.th/Content/nationalpark?contentid=11191 |title=สถิตินักท่องเที่ยวที่เข้าไปในอุทยานแห่งชาติ ปีงบประมาณ พ.ศง2562 |year=2019 |department=Department of National parks, Wildlife and Plant Conservation |language=Thai |trans-title=Statistics of tourists visiting National Parks fiscal year 2019 |access-date=16 February 2021 |postscript=, no.37 Yhan Sadet–Ko Pha-ngan N.P.}}

| visitation_year = 2019

| governing_body = Department of National Parks, Wildlife and Plant Conservation

}}

Than Sadet–Ko Pha-ngan ({{langx|th|ธารเสด็จ-เกาะพะงัน}}) is a national park in southern Thailand, with an area of 26,866 rai ~ {{convert|43|km2|abbr=on}}

{{cite web |url=https://catalog.dnp.go.th/dataset/areaofnp/resource/3b372140-f2bf-4811-8819-bb8a8b1a100a |title=ข้อมูลพื้นที่อุทยานแห่งชาติ ที่ประกาศในราชกิจจานุบกษา 133 แห่ง |date=December 2020 |department=Department of National Parks, Wildlife and Plant Conservation |language=Thai | trans-title=National Park Area Information published in the 133 Government Gazettes |access-date=1 November 2022}}{{rp|132}} mostly on the island Pha-ngan. The park was established on 22 November 2018.{{cite journal |date=22 November 2018 |title=Royal Decree: Determine the forest land on Ko Pha-ngan and Ko Kong Than Sadet in the area of Ko Pha-ngan subdistrict and Ban Tai subdistrict, Ko Pha-ngan district, Surat Thani province to be a national park. B.E. 2561 (2018) |url=http://www.ratchakitcha.soc.go.th/DATA/PDF/2561/A/098/58.PDF |archive-url=https://web.archive.org/web/20220127144612/http://www.ratchakitcha.soc.go.th/DATA/PDF/2561/A/098/58.PDF |url-status=dead |archive-date=January 27, 2022 |access-date=30 December 2020 |journal=Royal Thai Government Gazette |volume=135 |issue=98 kor |pages=58–60}} It covers parts of the {{convert|65|km2|abbr=on}} Ko Pha-ngan island.

The park is named after the royal visit of Rama V, Than Sadet (lit. Royal River) who came to the island to visit the waterfall first in 1888, then returned as many as fourteen times over the next 21 years. Rama V's initials can still be seen carved in a commemorative rock near the estuary of the river where the waterfall empties into the sea at Than Sadet Bay. The river itself forms a series of waterfalls and rock pools along its 2.5 km length, providing excellent trekking possibilities for the experienced. Several other Thai monarchs have visited the site including the late King Rama IX.

Khao Ra is both the highest elevation of the park as well as of the whole island of Pha-ngan, peaking at 635 m above sea level.{{cite web |url=http://park.dnp.go.th/visitor/nationparkshow.php?PTA_CODE=9143 |title=Than Sadet-Koh Phangan National Park |department=Department National Parks, Wildlife and Plant Conservation |access-date=27 January 2022 |postscript=, soon after this date the webmaster from DNP, put all the individual webpages from national parks, wildlife sanctuaries and non-hunting areas down, for the modernisation of them all, maybe this will take several years.}}

In addition to the forest on Pha-ngan itself, the park also includes several small islands north and east of Pha-ngan, including Wao and Hin Bai archipelago.