Longtanhu is one of the 'Lanyang Twelve Views,' a historic list of scenic spots in the Yilan region.
The lake's original name, Dapizai, translates to 'big dam' or 'big reservoir,' reflecting its past function in local agriculture.
The lake basin was formed by natural geographical depression, distinguishing it from man-made reservoirs in the area.
Local ecological restoration efforts have focused on reintroducing native plant species along the shoreline to support indigenous fish populations.
Longtanhu, also known as Dragon Lake, is the largest natural lake in Yilan County, Taiwan. Situated in the foothills of the mountains, it was historically known as 'Dapizai' due to its status as a reservoir for irrigation. The lake features a circular 3-kilometer walking trail that surrounds the entire body of water. Its ecological environment supports a diverse population of aquatic birds and various species of fish. The area surrounding the lake has undergone development to include landscaped lawns and recreational facilities while maintaining its natural contours. It serves as a significant drainage basin and water conservation area for the Jiaoxi region.
The elevated boardwalk sections that offer a panoramic view of the lake reflecting the surrounding mountains.
Bring a sun hat and sunscreen, as large sections of the walking path around the lake lack overhead tree cover.
Visit during the early morning to observe the local birdlife before the heat of the day peaks.
Wear comfortable walking shoes to navigate the paved path that encircles the entire lake perimeter.
Do not attempt to swim or fish in the lake, as both activities are prohibited to preserve the water quality and local ecosystem.
Maintain a quiet volume to avoid disturbing the local bird populations and follow 'leave no trace' principles regarding waste.
