| Official Name: | Don Det |
| Native Name: | ດອນເດດ |
| Pushpin Map: | Laos |
| Pushpin Label Position: | bottom |
| Pushpin Map Caption: | Location in Laos |
| Subdivision Type: | Country |
| Subdivision Name: | Laos |
| Subdivision Type1: | Province |
| Subdivision Name1: | Champasak |
| Unit Pref: | Metric |
| Population Blank1 Title: | Ethnicities |
| Population Blank2 Title: | Religions |
| Population Blank2: | Buddhism |
| Timezone: | ICT |
| Utc Offset: | +7 |
Don Det (Lao: ດອນເດດ) is an island in the Mekong River in the Si Phan Don ("Four Thousand Islands") archipelago in Champasak Province of southern Laos.[1]
The Don Det–Don Khon railway was a 7km (04miles)-long narrow-gauge portage railway on the islands of Don Det and Don Khon, opened in 1893 to transport vessels, freight, and passengers along the Mekong River, and closed since the 1940s.[2] [3]
The walking path around the island is . Don Det is linked to its twin island Don Khon by a bridge.Don Som, the closest island accessible by pirogue, is from Don Det.
There is a Buddhist temple and two primary schools on the northern part of the island.[4]
Don Det features a tropical wet and dry climate. While the city is generally very warm throughout the year, it is noticeably cooler during December and January. Don Det also experiences wet and dry seasons, with the wet season from April until October, and the dry season during the remaining five months. Temperatures range from 15°C to 38°C.[5]
The Khone Phapheng Falls, a succession of impassable rapids that gave rise to the construction of the railway, are among the main features accessible from Don Det.[6] [7] Freshwater Irrawaddy dolphins (pakha), an endangered species,[8] [9] are now extinct.
Irrawaddy dolphins, water buffaloes (Bubalus bubalis), common house geckos (Hemidactylus frenatus),[10] bronze grass skink (Eutropis macularia),[11] and bioluminescent beetles[12] can be seen in Don Det.