The name 'Pengpeng' originates from the Atayal language, referring to the sound of bubbling water.
The water temperature at the source is significantly higher than the river water, requiring careful mixing to achieve a comfortable soaking temperature.
The spring is classified as a sodium bicarbonate hot spring, often referred to locally as 'beauty soup' due to its skin-softening properties.
The riverbed landscape changes periodically following heavy rainfall or typhoons, occasionally burying existing pools.
The site is located within a traditional hunting and gathering territory of the local Atayal people.
Pengpeng Hot Spring A-Zone is a wild, undeveloped geothermal area situated along the Fanfan River in Yilan County's Datong Township. The spring water emerges from the riverbed, allowing visitors to dig their own natural soaking pools in the gravelly terrain. The site features weakly alkaline carbonated springs with temperatures reaching up to 60 degrees Celsius. The area is located within an Indigenous tribal territory, specifically the Yingshi Village area. Reaching the spring requires traversing a riverbed, making access entirely dependent on local water levels and weather conditions. There are no man-made facilities, showers, or restrooms available on-site.
The elevated vantage point on the river bank looking down at the steam rising from the pools against the mountain backdrop.
Bring a sturdy shovel to assist in deepening or enlarging your natural soaking pool.
Wear water-friendly trekking sandals or sturdy closed-toe water shoes to navigate the river rocks safely.
Pack all trash out, as there are no waste management facilities in this remote natural setting.
Do not attempt to cross the river during or immediately after heavy rainfall due to flash flood risks.
Access may be restricted or closed by local tribal authorities during extreme weather events or periods of high water levels.
Respect the local Indigenous community's land; maintain silence and keep the area free of litter; wear modest swimwear.
