The lake is a remnant of an ancient volcanic crater, giving it a distinctive near-circular shape.
It is the largest lake in Yilan County.
The park was historically known as the 'Great Lake' before being renamed Longtanhu.
The lake serves as a critical flood-control and irrigation reservoir for the Jiaoxi plain.
The surrounding hillsides are part of a secondary forest ecosystem that supports local bird species.
Longtanhu Park is centered around a large natural lake that serves as a primary irrigation reservoir for the surrounding Jiaoxi Township farmland. The park features a peripheral walking path that encircles the entire lake, offering views of the surrounding mountainous landscape. Kayaking and paddleboard activities are available for visitors to explore the water. Designated picnic areas are situated along the lake banks under mature trees. The park is characterized by its volcanic geological history, which shaped the basin into its current circular form. Water from the lake is famous locally for its purity, once used in the production of traditional honey-scented tea.
The elevated viewing deck on the northern end of the lake, which provides a panoramic view of the water and surrounding peaks.
Bring a hat or umbrella for sun protection, as the path around the lake has sections with limited tree canopy.
Check the water recreation vendor status on-site, as equipment rentals can be weather-dependent.
Wear comfortable walking shoes to navigate the full loop around the lake perimeter.
Attempting to swim in the lake outside of designated supervised zones and water activity areas.
Maintain quiet to respect the natural environment; dispose of all trash in provided receptacles.
