The park contains the Wan Tsai Peninsula, which was originally used for farming before being incorporated into the country park system.
High Island Reservoir, which borders the park, was created by damming a channel between High Island and the Sai Kung Peninsula, turning a former strait into a reservoir.
The park area features significant deposits of rhyolitic volcanic rock, reflecting the region's intense volcanic activity during the Mesozoic era.
It is home to the Hong Kong Geopark's High Island section, known for its hexagonal volcanic rock columns.
Parts of the park are designated as Special Areas, which provide stricter environmental protection than standard country park zones.
Sai Kung West Country Park occupies 4,494 hectares on the Sai Kung Peninsula, featuring rugged terrain and extensive coastline. The park encompasses the Wan Tsai Peninsula, which includes a former agricultural settlement and a designated marine park area. High Island Reservoir, a significant water storage facility in Hong Kong, lies adjacent to the park's eastern border. The topography ranges from sea-level coastal bays to prominent peaks such as Tai To Yan and Kai Kung Leng. It provides a protected habitat for diverse wildlife including wild boar, barking deer, and various raptors. The park includes the Sai Kung West Country Park (Wan Tsai Extension), specifically designated for its diverse coastal vegetation and geological features. Visitors can access a network of hiking trails that connect the interior forests to the peninsula's viewpoints. Much of the terrain consists of igneous volcanic rock, characteristic of the broader Sai Kung region's geological history.
The ridgeline overlooking the High Island Reservoir dam for panoramic views of the water and the hexagonal rock cliffs.
Bring double the amount of water you anticipate needing, as there are very few natural or commercial refilling stations on the trails.
Use professional-grade hiking boots with high-traction outsoles, as the trails contain loose gravel and steep, uneven sections.
Apply high-SPF sun protection and insect repellent, as much of the trail is exposed to direct sunlight with limited overhead cover.
Attempting advanced trails during the peak of summer due to high heatstroke risk; underestimating the difficulty of trail elevation changes.
Carry out all trash, do not feed wildlife, stay on marked trails to prevent soil erosion, and refrain from smoking in non-designated areas.
