
Koh Rang Islands, Koh Chang: Snorkeling Day Trip Guide
What Koh Rang is, which islands in the group are worth a stop, how long the boat trip takes, and what to check before booking from Koh Chang.
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Last updated November 2026: koh rang is the largest island of the Koh Rang group in Mu Koh Chang National Park, about one hour by speedboat south of Koh Chang. Most visitors see it on a snorkeling or diving day trip, not as a place to stay. Use our snorkeling guide for Koh Chang for the wider picture.

Featured image: Krzysztof Golik, CC BY-SA 4.0, via Wikimedia Commons.
What Koh Rang Is and Who It Suits
Koh Rang is the namesake island of the Koh Rang group, inside Mu Koh Chang National Park. Local island guides place the group about one hour by speedboat south of Koh Chang. Snorkelers and divers go for the reef stops and a beach break between swims. Trips run as day tours, so expect a full day on the water. Koh Rang is not Koh Rong, the Cambodian island with a near-identical name. Make sure your booking names Mu Koh Chang National Park.
How to Get to Koh Rang from Koh Chang

Boats run south from Koh Chang, and the speedboat ride takes about one hour each way. Budget a full day: one hour out, several stops, and one hour back. You can join a shared tour or charter a private boat. Tours handle the route and the stop order. A charter lets you set the stop list, which matters because some boats skip beaches. Ask the operator for the departure pier, the pickup arrangements, and the exact islands on the route.
- Shared tour: fixed itinerary, fewer decisions, set departure time.
- Private charter: you choose stops and pace, but you arrange everything.
- Either way: get the island list in writing before you pay.

Koh Rang and Its Neighboring Islands: Which Stops Are Worth It
Snorkel tours here usually string several islands together. Koh Thong Lang is the eastern-most island of the group and one of the most popular snorkeling spots. Island guides call it plain to look at but the best for snorkelers. Koh Kra has a white sand beach on its south coast. In high season most tour boats moor off the sheltered north coast, so many visitors never reach that beach. Koh Thian (1) and Koh Thian (2) are easy to mix up. Koh Thian (2) and Koh Kra swap names between National Park and Thai Navy maps. Confirm your stops with the operator, not by map name. Two more aliases help: Koh Laun is also called Koh Yak Lek, and Koh Tun is also called Koh Rang Lek.

| Island | Role | Best for | Access note | Status |
|---|---|---|---|---|
| Koh Rang | Namesake and largest island of the group | Snorkeling and diving day trips | About one hour by speedboat from Koh Chang | Verify landing rules |
| Koh Thong Lang | Snorkel stop | Snorkelers | Eastern-most island of the group | Described as best for snorkelers |
| Koh Kra | Beach stop | White sand beach on the south coast | Boats often moor on the sheltered north coast in high season | Ask if the south beach is on the route |
| Koh Thian (2) | Snorkel stop on many trips | Snorkeling | Name swapped with Koh Kra on some maps | Verify by operator's list |
| Koh Thian (1) | Pass-by | Not a destination on its own | Not the same island as Koh Thian (2) | Verify |
| Koh Yak, Koh Laun, Koh Tun, Koh Klang, Koh Mapring group | Pass-by or optional stops | Scenery from the boat | Koh Laun = Koh Yak Lek; Koh Tun = Koh Rang Lek | Verify with operator |
Snorkeling vs Diving Around Koh Rang

Snorkeling suits a relaxed day with a beach stop and little preparation. Koh Thong Lang is the group's best-known snorkel spot. Certified divers have more choice across the Koh Chang area. Start with our overview of diving around Koh Chang. Named sites are listed in our guide to dive sites near Koh Chang. Two examples elsewhere in the area are the Hin Luk Bat dive site and a wreck dive off Koh Chang. Neither is at Koh Rang. New divers can compare PADI course levels before choosing a trip.
Costs, Park Fees, and What a Tour Usually Includes
Park fees for Koh Rang are set by the national park authority and change over time. Check the Department of National Parks and Mu Koh Chang National Park pages for the current amount.
- Is the park fee included in the tour price?
- Are lunch and drinking water included?
- Is snorkel gear included, and in what sizes?
- Is pickup from your Koh Chang hotel offered?
- Which islands will the boat stop at, and for how long?

Best Season and Sea Conditions
Sea conditions decide whether boats run, so read our best diving season guide before you pick a date. In high season, remember the north-coast mooring pattern at Koh Kra and ask the operator about park closure periods.

Planning Checklist and Mistakes to Avoid
Most problems come from vague bookings. Name the islands you want and ask what the boat does if the sea is rough. Expect basic facilities, since stops are park islands rather than resorts.

- Booking a Koh Rang tour without checking which islands it stops at.
- Assuming every stop has a beach to land on.
- Trusting map names when the Koh Thian and Koh Kra labels differ.
- Relying on old online info for fees or rules.
- Mixing up Koh Rang with Koh Rong in Cambodia.
Other Islands Nearby if You Want a Shorter Trip
Closer or different options exist. Try snorkeling around Koh Mak for a lighter day. Another choice is snorkeling at Koh Wai. Further east, read about snorkeling at Koh Kood. Divers can look at diving at Koh Kood.
Frequently Asked Questions
Does Koh Chang have good snorkeling?
Yes, Koh Chang works as a base for snorkeling day trips, and the Koh Rang group is one of the main outer-island options. Koh Thong Lang is among the most popular snorkeling spots there. Our snorkeling guide for Koh Chang compares more areas.
Notes for your next dive trip
Optional updates to our Thai diving guides.
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