Oseosan Mountain
오서산
One of the highest peaks on the northern Boryeong coast of the West Sea (791 m). In autumn its ridge is one of Korea's five famous silver grass mountains, with views over the West Sea from the summit.
Oseosan rises 791 meters across Boryeong, Hongseong and Cheongyang, and is known as the 'Lighthouse of the West Sea.' In autumn the ridge from the main peak to Bird Rock is covered in silver grass (eoksae) that sways in the sunset light, making it one of Korea's best-known silver grass hikes. On clear days, the summit offers views of the islands of the West Sea and Cheonsu Bay. Starting from the Oseosan Natural Recreational Forest on the Boryeong side or the Myeongdae Valley trailhead, the round trip takes about 3-4 hours, and some steep sections require hiking boots. Weekends in grass season are crowded, so start early.
Opening hours
Open all day (best visited between sunrise and sunset)
Nearby sights
- Seongjusa Temple Site
- Seongjusan Recreational Forest
- Boryeong Coal Museum
- Chungcheong Suyeong Fortress & Ocheon Port
- Gaehwa Art Park
- Cheonbuk Oyster Village
- Daecheon Port & Fish Market
- Boryeong Mud Festival & Mud Square