Speed across turquoise seas from Koh Samui to the limestone isles of Angthong Marine Park. Kayak through cliff-carved channels, hike to the Emerald Lake, and snorkel reefs on this full-day speedboat excursion.
More ways to explore the area's outdoor wonders
The morning bite of sea spray and the engine’s steady thrum set the tempo as the speedboat peels away from Koh Samui toward 42 craggy isles. Limestone cliffs rise like weathered walls; channels carve shadowed corridors where kayaks slip through glassy water. At Koh Mae Ko a short, sweaty climb through low jungle deposits you at the rim of the Emerald Lake, a startling saltwater lagoon caught inside a collapsed crater. The view opens—green water cupped by stone—where the wind feels like a hand pushing you to stay.
Difficulty
moderate
Duration
7–8 hours
Fitness Level
Suitable for moderately active travelers comfortable with short hikes (10–30 minutes) and basic paddling; not suitable for those with serious mobility or cardiovascular issues.
Wildlife
History
Mu Ko Ang Thong was designated a national marine park in 1980 to protect its coral reefs, seagrass beds and island ecosystems important to local fisheries.
Conservation
Visitors are encouraged to use reef-safe sunscreen, avoid touching coral, and follow park rules; boat operators must adhere to anchoring zones to protect reefs.
Reserve your spot on the Angthong Marine Park Day Trip by Speedboat from Koh Samui today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Sun protection
Bring reef-safe sunscreen, a wide-brim hat, and UV-protective clothing—the boat ride and exposed viewpoints intensify sun exposure.
Sturdy footwear
Wear trail shoes or sandals with good grip for short, uneven hikes to viewpoints and rocky beaches.
Hydration & snacks
Carry at least 1–2 liters of water and light snacks if you get hungry between boat stops—tropical heat depletes energy fast.
Follow guides for water safety
Currents can change quickly; always wear the provided life jacket when kayaking or snorkeling and heed guide instructions.
Reef-safe sunscreen
Protects skin while minimizing damage to coral ecosystems.
summer
Light waterproof bag
Keeps phone, camera, and key items dry during boat transfers and kayaking.
Sturdy trail sandals or shoes
Provides grip and protection on limestone trails and beaches.
Snorkel mask (personal)
Using your own mask can improve fit and comfort during reef swims.