Koh Mak does not have a list of attractions, and that is the point. It is a small, flat, privately owned plantation island that markets itself on doing less, and it leans into a low-carbon, low-key ethos that keeps development modest. The best things to do here are quiet ones — but a few are genuinely worth planning around, and one of them, the cycling, is something the hillier neighbours simply cannot offer.
Cycle the island
This is Koh Mak's signature. Unlike hilly Koh Chang and Koh Kood, where you need a scooter, Koh Mak is flat and small enough to explore properly by bicycle — past coconut and rubber plantations, along quiet back roads, between the two main beaches in about 15 minutes. Many resorts lend bikes for free or next to nothing. Half a day pedalling the interior tracks is the most Koh Mak thing you can do.
Snorkel the Koh Rang marine park
The clearest water and healthiest coral in the archipelago is at the Koh Rang National Marine Park, the protected cluster of islands between Koh Mak and Koh Kood. Snorkelling boats run from Koh Mak for roughly 800 to 1,000 baht per person, half or full day, often visiting several sites. On a calm, clear-sea day this is the marine highlight of the whole trip — prioritise it.
Day-trip to Koh Kham
Just off the north-west coast lies Koh Kham, a tiny island with clear water and good snorkelling that makes an easy half-day outing from Koh Mak by short boat. It is the kind of low-effort, high-reward trip the island does well: calm sea, a small beach, a snorkel, and back in time for dinner.
Kayak between the beaches
The calm water and short distances make Koh Mak good for kayaking — paddle along the coast between bays, poke into quiet coves, and reach little stretches of sand you cannot easily walk to. Most resorts have kayaks; it is a free or cheap way to spend a flat-sea morning.
Slow down on purpose
Beyond the cycling and the boats, Koh Mak's offering is deliberately thin: a Thai massage, a Muay Thai session at a local gym, a sunset beer at Ao Suan Yai, a long lunch. The island leans into being a low-carbon, low-noise place to do nothing in particular. If that sounds like too little, you would be happier on Koh Chang; if it sounds like exactly enough, you have found the right island.
Frequently Asked Questions
What is there to do on Koh Mak?
Cycle the flat plantation tracks and back roads, kayak between the beaches, take a snorkelling boat to the Koh Rang marine park, day-trip to tiny Koh Kham just offshore, and watch the sunset at Ao Suan Yai. It is a slow island — these are gentle outings, not a packed itinerary.
Is Koh Mak good for cycling?
It is the best of the three Trat islands for it. Koh Mak is flat and small, with quiet plantation tracks and back roads, so a bicycle genuinely gets you everywhere. Many resorts lend bikes, and cycling between the two main beaches takes about 15 minutes.
What is Koh Kham and can you visit?
Koh Kham is a tiny island just off Koh Mak's north-west coast, known for clear water and snorkelling. You can reach it on a short boat trip arranged locally, making it an easy half-day from Koh Mak when the sea is calm.
Is the snorkelling good around Koh Mak?
The best coral is on a boat trip to the Koh Rang National Marine Park between Koh Mak and Koh Kood, where the water is clear and the reef healthy. Trips run from the island for roughly 800 to 1,000 baht per person and are the marine highlight of a Koh Mak stay.
