The park contains 'single-sided mountain' geology, where one side of a rock formation is gentle and the other is a steep cliff face.
The name 'Beiguan' translates to 'Northern Gate', reflecting its historical role as a defensive checkpoint protecting Yilan.
The sedimentary rock formations within the park are estimated to have been formed by tectonic lifting and erosion over millions of years.
Visitors can observe 'bean-curd rocks' (tofu rocks), created by jointing and weathering patterns in the sandstone.
The site offers a direct visual line of sight to Guishan Island, a volcanic island known for its frequent steam vent activity.
The rock layers are part of the Miocene-era geological formations common to this segment of the Northeast Coast.
Beiguan Tidal Park is a coastal geological site in Toucheng, Yilan, known for its complex sedimentary rock layers and sea-eroded landforms. The park features a trail system that navigates through narrow canyons formed by 'single-sided mountains' and 'bean-curd rocks'. From the cliffside paths, visitors can observe the Guishan Island (Turtle Island) skyline offshore. The area was historically used as a military outpost during the Qing Dynasty due to its strategic position guarding the northern entrance to the Yilan Plain. The site provides views of the Pacific Ocean and the ongoing interaction between tidal currents and the rugged volcanic and sedimentary coastline. Vegetation includes coastal flora adapted to high-salinity and wind-exposed environments.
The narrow 'One-Line Sky' rock corridor that frames a view of the Pacific Ocean and Guishan Island.
Wear footwear with high-traction soles as the rock trails become slippery when wet or exposed to sea spray.
Bring a windbreaker or outer layer, as the coastal location experiences strong, constant sea breezes.
Follow the designated cliff paths closely, as the rock terrain is uneven and steep in several sections.
Attempting to climb the unstable cliff faces or venturing onto wet rocks near the surf line during high tide.
Stay on marked trails to protect the fragile sedimentary rock formations and prevent falls.
