The 4000 Islands (Si Phan Don) are a cluster of river islands in the Mekong at the southern tip of Laos, near the Cambodian border. Most travelers stay on Don Det, the laid-back backpacker island, or on quieter Don Khon, which is joined to it by an old French railway bridge; Don Khong is the largest and least visited. You get there from Pakse by minivan or bus to Nakasang (about 2½–3 hours) and a short boat ride. The main sights are the Li Phi and Khone Phapheng waterfalls, kayaking, cycling and simply relaxing in a hammock by the river.
4000 Islands: quick facts
| Where | Champasak province, far southern Laos, on the Cambodian border |
| Main islands | Don Det (backpackers), Don Khon (quieter), Don Khong (largest, very quiet) |
| Getting there | Pakse to Nakasang by minivan or bus (2½–3 hours), then a boat (about 15 minutes) |
| Time needed | 2–4 days |
| Budget rooms | About $10–20 a night on Don Det; more on Don Khon |
| Money | Bring cash in kip from Pakse; ATMs are scarce or absent on the islands |
| Best time | November to February |
Is the 4000 Islands worth visiting?
Yes, if you want to slow down. There are few big sights, but the river scenery, sunsets, waterfalls and village life make it one of the most relaxing places in Southeast Asia. It also works well as a stop between southern Laos and Cambodia. If you prefer busy nightlife or beaches, you may find it too quiet after a day or two.
Which island should you stay on?
- Don Det has the most guesthouses, cafés and bars, especially along the “sunset side” and “sunrise side” paths at the northern tip. It is sociable but still quiet by most standards.
- Don Khon is calmer and more family-friendly, with nicer mid-range bungalows, temples, remains of the old French railway and the Li Phi waterfall.
- Don Khong is the largest island and sees very few visitors. It is reached separately, by road and a short boat crossing further north, and suits travelers looking for real quiet.
How to get to the 4000 Islands
From Pakse
Pakse is the gateway to southern Laos. Minivans and buses run to Nakasang (also spelled Nakasong), the departure point for boats to Don Det and Don Khon, in about 2½–3 hours. Many guesthouses and agencies in Pakse sell combined minivan-and-boat tickets that take you all the way to your island. From Nakasang, boats take about 15 minutes; fares are a few dollars per person and depend on the island and how many passengers there are.
👉 Compare Pakse to Don Det minivan and boat tickets on Bookaway (affiliate link)
From Vientiane
Take an overnight sleeper bus to Pakse (around 10–12 hours) and continue as above, or fly to Pakse and travel the last stretch by road. If you are coming from the north, see our guide to Vientiane to Luang Prabang for the train on the northern part of the country.
From Cambodia
The land border between Cambodia and Laos at Trapeang Kriel–Nong Nok Khiene, north of Stung Treng, is the usual crossing to the 4000 Islands and has remained open while the Thailand–Cambodia border has been closed. Buses and minivans from Siem Reap, Phnom Penh or Kratie travel via Stung Treng; from Siem Reap the trip takes about 8 hours or more. Laos issues visas on arrival at this crossing for many nationalities; bring US dollars and a passport photo, and expect small unofficial “fees”. Check current procedures before you travel.
Things to do in the 4000 Islands
Cycle around Don Det and Don Khon
Bicycles cost about 25,000 kip (around $1) a day and are the best way to explore. A loop of Don Det takes a couple of hours past rice fields, villages and riverside cafés. Cross the old railway bridge to Don Khon, where you can see a rusting French locomotive and the remains of the colonial-era railway that once carried goods around the waterfalls.
Li Phi (Somphamit) waterfall
On Don Khon, about 10 minutes by bike from the bridge, Li Phi is a wide stretch of rapids and falls surrounded by a small park with walkways, viewpoints and cafés. A modest entrance fee is charged, and a zipline and extra attractions inside the park cost more.
Khone Phapheng Falls
Khone Phapheng, on the mainland east of the islands, is the largest waterfall in Southeast Asia by volume: a series of thundering rapids rather than a single drop, at its most powerful in and after the rainy season. You can reach it by tuk-tuk from Nakasang, combine it with a kayaking tour, or stop on the way to or from Pakse. Check the entrance fee when you arrive.
Kayaking
Full-day guided kayaking trips are one of the most popular activities, usually paddling between the islands and combining stops at waterfalls, lunch and transport back. Book with an operator that provides life jackets and experienced guides, because the Mekong currents are strong.
Can you still see Irrawaddy dolphins?
Not reliably in Laos. The small group of Irrawaddy dolphins that lived in a deep pool on the Lao–Cambodian border has disappeared, with WWF reporting that the last one known on the Lao stretch died in 2022. If seeing dolphins matters to you, the best place is now around Kratie in Cambodia, where a larger population remains. Be wary of tours that still promise dolphin sightings near the islands.
Watch the sunset and relax
The western shore of Don Det is lined with hammock-filled cafés and bungalows facing the sunset. Many travelers spend afternoons reading, swimming in calm spots or floating on tubes. Avoid swimming or tubing near rapids or after drinking, because the current can be dangerous.
Where to stay in the 4000 Islands
Don Det has simple riverside bungalows and guesthouses from about $10–20 a night, many with hammocks and river views. Don Khon has more comfortable bungalows and small hotels from about $25–50, and there are a few upmarket resorts on the islands and on the mainland near Nakasang. In peak season (December–February), book the first night in advance. Compare places to stay in the 4000 Islands on Booking.com.
Money, internet and practical tips
- Cash: there may be no working ATM on the islands, and cash withdrawals at shops in Nakasang carry high fees, so bring enough kip from Pakse. Our Laos currency guide explains ATM limits and fees.
- Electricity and Wi-Fi are available in most guesthouses but can be unreliable.
- Mosquitoes: use repellent, especially at dusk; parts of southern Laos have a malaria risk, so check health advice before you travel.
- Drugs: “happy” menus still appear, but drugs are illegal in Laos and penalties are severe. See is Laos safe?
Best time to visit the 4000 Islands
November to February is the best time, with dry weather, comfortable temperatures and good conditions for cycling and kayaking. March to May is very hot, and the river drops, revealing more islands and sandbanks. From June to October, the rainy season raises the Mekong, many smaller islands disappear under water and Khone Phapheng is at its most dramatic, but some paths get muddy and activities can be limited.
How many days in the 4000 Islands?
Two or three nights is enough for most people: one day for cycling and Li Phi, one for kayaking or Khone Phapheng, and time to relax. Many travelers stay longer than planned. For overall costs, see how much a trip to Laos costs.
FAQ
Are there really 4,000 islands?
Roughly, in the dry season, when the Mekong drops and countless islets and sandbanks appear. In the rainy season many of them are under water.
Don Det or Don Khon?
Choose Don Det for cheap bungalows and a social atmosphere, Don Khon for quiet, slightly better accommodation and easy access to the waterfalls. They are connected by a bridge, so you can visit both.
Can you go from the 4000 Islands to Cambodia?
Yes. Travel agencies on the islands sell tickets to Stung Treng, Kratie, Siem Reap and Phnom Penh via the nearby border. Read our Cambodia safety guide and things to do in Siem Reap before you continue.
