Si Phan Don Travel Guide: The 4000 islands of southern Laos
Si Phan Don translates to the four thousand islands, and the name is only a minor exaggeration. Where the Mekong widens and slows near the Cambodian border, the river splits into dozens of islands large enough to farm and hundreds more that amount to no more than a sandbar and a tree. I came expecting a quiet end to a long trip through Laos, and I left a week later without having seen a fraction of it.
Where the islands sit
The largest islands are Don Khong, the big one in the centre, and the pair of Don Det and Don Khon in the south, connected to each other by a short bridge. Most visitors base themselves on Don Det, where riverside bungalows and guesthouses line the banks, or cross to the quieter Don Khon. Don Khong sees far fewer travellers and rewards the patient with cycling trails through rice fields and pretty Khmer temple ruins.
Getting there takes a while, whichever island you choose. The nearest sizeable town is Pakse, and from there you take a bus or minivan south to the port village of Nakasong. A shared longtail boat then carries you out to the islands, engines humming across the brown water. The crossing is short but wonderful, with the silhouettes of islands sliding past and locals waving from fishing boats.
The waterfalls everyone comes for
The south-west tip of Don Khon holds the real reason most people make the journey. Khon Phapheng, just on the mainland across the water from Don Khon, is often described as the largest waterfall in Southeast Asia by volume. It is not a single dramatic drop but a wide series of rapids and ledges where the entire Mekong seems to want to leave at once. Stand on the viewing platform and the spray and the roar are steady and immense.
Also on Don Khon is Li Phi, quieter and easier to reach, with stepped rock pools that make for a good swim on a hot afternoon. Bring waterproof sandals, because the stones get slippery close to the water.
Dolphins in the river
Just south of the islands there is a section of the Mekong where the rare Irrawaddy river dolphin still survives. Boat trips leave from Ban Khon on Don Khon in the late afternoon, drifting out to the deep pools near the Cambodian border. Dolphins surface without warning, a curved back and a blow and then nothing for ten minutes. You need luck and patience, and on my visit two of them gave us a full show about half an hour in, so it was worth every minute of waiting.
Life on slow pace
The islands run on island time. Days here have a pleasant rhythm, with daytime spent swimming, reading in a hammock, or renting a bicycle to pedal the dusty lanes between villages and rice paddies. Evenings bring noodle soup from a streetside cart and a beer on a deck facing the sunset. On Don Det a handful of bars host reggae nights and casual parties, while Don Khon stays largely quiet after dark.
Most food is simple and good, heavy on river fish, sticky rice, and laap, the minced meat salad that is a Lao staple. A few places do western breakfasts and banana pancakes if you are tired of rice in the morning.
Where to stay
Accommodation runs from near-basic bamboo bungalows to comfortable fan rooms with river views, and it is cheap by any standard. On Don Det the best rooms go fast in the dry season, so arriving in the early afternoon improves your pick. Don Khon has a handful of charming older guesthouses set in gardens, and I found them the most peaceful of all. Don Khong offers a step up in quality and the emptiest roads for cycling.
How much time you need
One night feels rushed, and I would push for at least two, ideally three. In three days you can see both waterfalls, take a dolphin trip, and cycle most of Don Det and Don Khon without hurrying. Travellers heading on to Cambodia usually catch a boat or bus south from here, and it is easy enough to arrange onward transport at guesthouses a day in advance.
Practical notes
Cash is king on the islands, and many guesthouses do not take cards, so arrive with enough kip for your whole stay. Electricity comes from generators and solar in places, so bring a battery pack. Internet is slow and unreliable, which many people quietly appreciate. The dry season from November to February is the comfortable window, with cooler days and calm river levels, though the islands are genuinely pleasant year round barring the wettest weeks.
For all the planning, Si Phan Don rewards those who stop trying to tick things off. The best hours are the unplanned ones, sitting on a dock with your legs over the water while the Mekong slides endlessly past, not going anywhere in particular. That version of the four thousand islands is the one I still think about, and it is available to anyone who slows down enough to find it.
