Hupao Spring (also known as Hupao Hot Spring, Chinese: 湖埔溫泉) is a geothermal hot‑spring site located in Yuchi Township, Nantou County, Taiwan. It lies on the western shore of Sun Moon Lake, approximately 10 km north of the lake’s main tourist zone.
Geography and Geology
Hupao Spring emerges from the region’s volcanic substratum, which is part of the Central Mountain Range’s complex tectonic setting. Groundwater percolates deep into the earth’s crust, is heated by residual magmatic activity, and rises to the surface along faults and fractures. The spring water temperature at the source ranges from 40 °C to 58 °C (104 °F–136 °F).
The water is characterized as slightly alkaline (pH ≈ 7.5–8.0) and contains dissolved minerals such as calcium, magnesium, sodium, potassium, and sulfates. These chemical properties are typical of the carbonate‑rich hot springs found throughout central Taiwan.
History
The use of Hupao Spring for therapeutic bathing dates to the early 20th century, when Japanese colonial authorities developed a series of bathhouses in the area. After World War II, the spring continued to serve local residents and later attracted tourists as part of the broader development of Sun Moon Lake as a leisure destination.
Tourism and Facilities
Hupao Spring is a popular attraction for both domestic and international visitors. The site includes:
- Public hot‑spring pool – an open‑air pool fed directly by the spring, equipped with changing rooms and a small restaurant.
- Resort accommodations – several hotels and guesthouses, such as the Hupao Resort and the Sun Moon Lake Hotel, which offer private hot‑spring baths and spa services.
- Recreational amenities – walking paths, a small lakefront park, and viewpoints offering panoramas of Sun Moon Lake.
The spring’s relatively moderate temperature and mineral composition are marketed for therapeutic benefits, including relief of muscle tension and skin conditions, although scientific validation of specific health effects is limited.
Access
Hupao Spring is accessible via Provincial Highway 21, which encircles Sun Moon Lake. Regular bus services connect the spring with major transit hubs in Taichung and Chiayi. Private vehicles and bicycles are also commonly used by tourists.
Environmental Considerations
The spring’s output is monitored by local environmental agencies to ensure sustainable water extraction and to prevent contamination of the adjacent Sun Moon Lake ecosystem. Conservation efforts focus on maintaining natural vegetation around the spring source and managing visitor impact on the surrounding habitats.