Si Phan Don

Si Phan Don, the “Four Thousand Islands,” is an archipelago and riverine region in the Mekong River within Champasak province, southern Laos. The name refers to the many channels and shallow islands formed by the Mekong as it spreads through this low-gradient section.

The area offers lowland river scenery, relaxed island villages, cycling and short boat trips between islands such as Don Khong, Don Det and Don Khon. Visitors use the islands as a base for river viewing, birdwatching and to reach nearby rapids and falls.

The islands and channels have long been used for local riverine agriculture and transport; in the colonial era the French constructed short rail and causeway works around Don Khon to bypass the river rapids. Small settlements on the islands developed around fishing and river trade.

Situated on the Mekong River in southern Laos near the border with Cambodia, the archipelago is part of Champasak province and lies downstream of the main river channels that pass through Pakse and the surrounding lowlands.

• Seasonal access: Peak visitor activity is in the dry season when boat crossings are regular and river levels are lower, exposing rapids and sandbanks.
• Accommodation and transport: Accommodation ranges from simple guesthouses on Don Det and Don Khon to larger lodgings on Don Khong, with local boats used for island transfers.

What to See #

• Don Khong: Don Khong is the largest island in the group, with agricultural villages and the provincial administrative centre for the archipelago.
• Don Det: Don Det is a narrow island popular with budget travellers, bicycle routes and riverside guesthouses; ferries connect it to neighbouring islands.
• Don Khon and colonial railway remnants: Don Khon is linked to Don Det by an old French-built causeway and offers viewpoints, remnants of a colonial-era bypass railway and access to nearby rapids and falls.