The black sand found at this beach is composed of iron-rich volcanic minerals deposited by the Lanyang River system.
Guishan Island, situated directly offshore, is one of the few active volcanoes in the Taiwan region.
The park is situated within the Zhuangwei Coastal Dune Landscape Area, which spans 15 kilometers of Yilan's coastline.
The beach is notorious for 'sneaker waves' and steep underwater topography that makes the water unsafe for casual swimming.
This site is a key transition point for migratory birds moving along the East Asian-Australasian Flyway.
Yongzhen Seaside Park is a coastal recreational area in Zhuangwei Township, Yilan County, featuring a distinctive volcanic black sand beach. The park serves as a primary viewing location for the sunrise over the Pacific Ocean, with Guishan Island (Turtle Island) visible on the horizon. The landscape is characterized by a mix of sandy shoreline, low-lying coastal dunes, and protected windbreak forests. It provides direct beach access for walking and photography rather than swimming, as the steep drop-offs and strong currents present significant hazards. The park is integrated into the Yilan regional cycling network, connecting the local coastline to broader path systems in the Lanyang Plain. The area remains largely undeveloped compared to other popular Yilan beaches, maintaining a focus on natural coastal views.
The elevated viewing platform within the park offering a framed perspective of Guishan Island against the sunrise.
Visit during low tide to maximize the amount of walkable sand and see the full extent of the dark volcanic grains.
Bring binoculars if you intend to observe the maritime activity around Guishan Island.
Avoid entering the water completely, as rip currents are common and life guards are not consistently stationed throughout the year.
Do not attempt to swim in the ocean here due to dangerous rip currents and deep-water drop-offs.
Avoid walking into the tall dune vegetation, which is protected to prevent soil erosion.
