Koh Chong Lad Yai, frequently referred to by locals as Koh Chong Lard Yai, is a small island with a distinctive geographical profile situated at a key junction within Phang Nga Bay. Located in the Koh Yao District of Phang Nga Province, it stands as a natural sentinel between the northern reaches of Koh Yao Yai and the vast "forest of islands" to the east. The island's morphology is characterized by a narrow, elongated shape stretching from north to south, surrounded by dynamic currents that circulate through the straits. These currents play a vital role in maintaining a highly productive marine ecosystem, specifically supporting extensive shallow-water coral reefs that serve as a nursery for numerous fish species and diverse marine life.

The historical and cultural significance of Koh Chong Lad Yai is deeply intertwined with the maritime heritage of the local Moken and Koh Yao communities. For generations, the narrow channel separating Koh Chong Lad Yai from its smaller neighbor, Koh Chong Lad Noi, has served as a strategic navigational route and a reliable sanctuary for traditional fishing vessels seeking shelter from seasonal monsoons. The island's beaches, while intimate and subject to tidal fluctuations, consist of fine white sand interspersed with coral fragments, a testament to the pristine natural environment that remains largely untouched by large-scale commercial tourism or urban development. Visiting this island offers a rare glimpse into the authentic, historical atmosphere of the Andaman coastal wilderness.

From an ecological tourism perspective, Koh Chong Lad Yai is a premier destination for sea kayakers and sailing enthusiasts. The unique hydrodynamics of the surrounding strait offer a compelling yet safe environment for exploration. Circumnavigating the island reveals fascinating geological formations, including weathered limestone sculptures and small coastal cavities shaped by millennia of erosion. Furthermore, the waters around the island serve as a significant site for marine biological studies; the presence of healthy massive corals (Porites) and staghorn corals (Acropora) indicates exceptional water quality and highlights the effectiveness of the community-led conservation efforts that protect this vital part of Phang Nga Bay’s natural heritage.

• The island can be reached by hiring a local longtail boat from Chong Lard Pier on Koh Yao Yai or Manoh Pier on Koh Yao Noi. The boat ride takes about 15-20 minutes.

• Always check the tide tables before your trip for the easiest beach access.

• Bring your own drinking water and snacks as there are no shops on the island.

• Prepare waterproof bags for your electronics when traveling by boat or kayak.

• Wear water shoes to protect your feet from sharp rocks and coral fragments.

Admission Fees:

• Free admission.

Opening Hours:

• Open to visitors 24 hours a day, every day.