Source: https://heyseorak.com/seoraksan/yangpok Last-Updated: 2026-10-16 --- # Cheonbuldong Valley Hike: Seoraksan's Gorge to Yangpok Shelter Type: Seoraksan trail guide Difficulty: moderate Distance: 6.5km one-way Duration: 5.5–6.5h round trip Trailhead: Sogongwon (Seorakdong) ## Overview Cheonbuldong Valley (천불동계곡, "Valley of a Thousand Buddhas") is the granite gorge behind Biseondae — Mt. Seorak's great valley walk. This guide follows it to **Yangpok Shelter (양폭대피소)** and back: 6.5 km each way from the Sogongwon entrance, about 520 m of climbing, and no reservation. The first 3 km to Biseondae are a flat, easy forest path that most visitors walk anyway. The difference starts at Biseondae. Past it, the valley narrows into sheer rock walls, waterfalls, and walkways and stairs fixed to the gorge sides, and the crowds thin out. It is the same valley the [Daecheongbong overnight](/seoraksan/daecheongbong-overnight) climbs on its first day. Here you get its best part as a day hike, and turn around at the shelter. The park grades the course easy, and the gradient is gentle. The day is long, though: 13 km on foot, half of it over rock. ## The Route Distances are the Korea National Park Service's signposted figures. **Sogongwon → Biseondae (3.0 km, ~1h):** A wide, near-flat path through pine forest along the stream. It is shared with the [Biseondae and Geumganggul](/seoraksan/biseondae-geumganggul) walk, so expect company. At **Biseondae (비선대)** the stream pours over broad granite slabs under sheer rock peaks. Use the toilets and top up here; this is the last easy stop. **Biseondae → Yangpok Shelter (3.5 km, ~1h 50min):** Biseondae is also the entry checkpoint (see below), and past it the valley closes in. The steepest stretch of the day comes first, a short, stiff climb out of Biseondae. Then the path settles into the gorge: stone, roots, short scree stretches and bridges over the stream. **Gwimyeonam (귀면암)**, a great block of rock named for a demon's face, stands over the trail on the way up. The upper valley is the best of it. **Oryeon Falls (오련폭포)** drops through five linked pools in a slot of rock, and the trail runs on metal walkways and stairs bolted to the cliff beside it. The last stretch climbs to **Yangpok Falls (양폭포)** and the shelter just above, at about 720 m. **Yangpok → Sogongwon:** The same way back. It is mostly downhill, but plan on 2.5–3 hours: the rock is slow underfoot and tired legs are slower. Cheondang Falls (천당폭포) is a short climb beyond the shelter, on the trail toward Huiungak. It is tempting, but every step up is a step to come down, and the stairs above Yangpok steepen. Decide at the shelter by the clock, not by how you feel. ## Entry Times and Closures These come from the Korea National Park Service, checked October 16, 2026. - **Daily entry limit:** The Biseondae checkpoint lets walkers into the valley toward Yangpok from **03:00 to 14:00 from April to October** and **04:00 to 12:00 from November to March**. After that you can still walk to Biseondae, but not beyond. - **Fire-prevention closures:** In spring and autumn the trail past Biseondae closes, along with all the high trails and shelters. In 2026 that was March 4–May 15, and it is **November 15–December 15**. In recent closures, Sogongwon to Biseondae has stayed open. - **Weather:** Heavy-rain and strong-wind advisories close the valley at short notice, as happened in June and August 2026. The rock and stairs are also slick after rain. The entry limit is not the time to aim for. Starting into the valley at 14:00 puts you back after dark in October. Plan to leave Sogongwon by 9:00 and be at Biseondae by 10:00. ## What to Bring - **Shoes with grip:** Hiking shoes or boots. Wet granite and metal stairs are slippery in trainers. - **Water and lunch:** At least 1.5 liters of water and real food. Yangpok Shelter's small shop sells bottled water, instant rice and energy bars, but don't count on it. - **A layer and rain shell:** The gorge is shaded and stays cool even when Sokcho is warm. - **Headlamp:** Even on a day hike. Dusk comes early in a deep valley, and a slow return is common. - **Offline map:** Phone signal can drop in the gorge. Yangpok Shelter also sells crampons. From December, ice forms on the steps and walkways, and microspikes become essential. ## Staying at Yangpok Shelter Yangpok is a small KNPS mountain shelter. Sleeping there lets you start up toward Huiungak and the high ridge before dawn. - **Booking:** reservation.knps.or.kr, the same lottery and leftover system as the other Seorak shelters. - **Cost:** ₩20,000 a night Sunday–Thursday; ₩30,000 on Fridays, Saturdays, the night before a public holiday, and every night July–August and October 1–November 15. - **Later entry:** Guests booked at Yangpok can pass the Biseondae checkpoint up to two hours after the daily limit. - **Closed:** November 15–December 15, 2026, for fire prevention. Bring your own sleeping bag; no bedding is rented out. ## How to Get There The trail starts at the **Sogongwon (소공원)** entrance, shared with the [Ulsanbawi](/seoraksan/ulsanbawi) and [Biryong Falls](/seoraksan/biryong-falls) trails and the cable car. - **Bus:** Bus 7 or 7-1 from Sokcho — about 30 minutes, ₩1,530 by card. Take an early one; the trail needs a morning start. - **Taxi:** From central Sokcho, about 20 minutes. - **Car:** Paid parking at Sogongwon. It fills early on autumn weekends. Park entry is free. From the entrance, follow the signs for Biseondae (비선대) past Sinheungsa; at Biseondae, continue toward Yangpok (양폭) and Huiungak (희운각). ## When to Go - **Mid- to late October:** The valley's color usually peaks after the ridges, in the second half of October. It is the most beautiful time and the busiest. - **Late May to June:** Fresh green and full waterfalls. The best window after the spring closure lifts. - **July–August:** Cool in the gorge, but summer downpours bring the most weather closures. - **Early November:** Quiet and bare, with short days. The trail closes from November 15. - **Winter (mid-December to February):** Icy and serious. Go only with microspikes and the shorter 12:00 entry limit in mind. On an autumn weekend, walk the busy first 3 km early. The flat path to Biseondae fills by mid-morning, but the valley beyond stays quieter because the entry limit and the distance turn most people back at Biseondae.