An island reached by a seawall
Sinsido is part of Gunsan's Gogunsan Archipelago and is connected to the mainland by the Saemangeum Seawall. Ridges around Woryeongbong and Daegaksan rise above its coastline. The city describes road access via Yamido and the seawall.
Two official routes, not one
The city's Gubul Route 7 Sinsido Trail describes a route of about 8 km with an indicative walking duration of 188 minutes. Its separate Sinsido island page outlines a different hike of about 9.2 km and four hours, passing a drainage gate, metal stairs, Woryeongbong and Daegaksan. These are not interchangeable journey times.
What to notice
Woryeongbong is associated with autumn foliage; Daegaksan Observatory offers views of the seawall and neighbouring islands when visibility permits. Conditions depend on wind, fog and daylight.
Before travelling
The island-wide location is Sinsido-ri, Okdo-myeon, Gunsan-si, Jeonbuk State. Confirm your exact trailhead, parking, current transport and trail restrictions. Expect uneven sections and stairs, carry water and plan to finish before dark. Compare the two original city guides before choosing a route.