Quick FactsOverview
About Osaek Hot Springs
Osaek Hot Springs, South Korea is a natural carbonated hot spring facility in the basement of the Osaek Greenyard Hotel in Osaek-ri, Seo-myeon, Yangyang-gun, Gangwon-do, at approximately 650 metres above sea level on the southern flank of Seoraksan National Park. The spring is designated Natural Monument No. 529 and the area was officially gazetted as Osaek Hot Springs Zone after geological examination by Gangwon Province in 1982.
Two spring types feed the facility: a natural carbonated mineral spring producing iron-rich water that turns red on contact with air, and a high-temperature alkaline hot spring developed from 470 metres underground. Pool temperatures range from 27 degrees Celsius in the carbonated pools to 38, 41, and 43 degrees Celsius in the heated baths. Specialty baths include mugwort, hinoki, and pine needle options. The spring was reportedly discovered by a Buddhist monk during the Joseon period and is sometimes called Miinoncheon, meaning Beauty Hot Springs. Family hot springs near Sokcho at this altitude and with carbonated water of this type are rare in Gangwon Province.
Location & Access
Getting to Osaek Hot Springs
Osaek Hot Springs is inside the Osaek Greenyard Hotel at 34 Daecheongbong-gil, Seo-myeon, Yangyang-gun, Gangwon-do, approximately 20 kilometres west of Yangyang and 5 kilometres southeast of Hangyeryeong Pass. The Osaek valley sits at around 500 metres elevation in the southern Seoraksan area.
By public transport, take a bus from Yangyang Bus Terminal toward Osaek Mineral Spring. The local bus runs approximately six times per day from 06:45 to 20:15. Bus number 1 picks up near Yangyang traditional market and the journey takes approximately 40 minutes. From Seoul, take an intercity bus from Dong Seoul Bus Terminal directly to Osaek, or travel first to Sokcho and connect by local bus. By car from Seoul, the drive takes approximately 2.5 to 3 hours via the Incheon-Yangyang Expressway to Seo-myeon.
The facility is open daily from 06:00 to 22:00 with last entry at 21:00. Walk-in admission is available without reservation. Hotel guests at the Osaek Greenyard Hotel receive discounted access. Parking at the Osaek area is available for a flat daily fee. The hot spring entrance is at the basement level of the hotel. The Osaek area is also the trailhead for three Seoraksan routes: Jujeongol Valley, Heullimgol waterfall, and the path to Daecheongbong Peak.
Suitability & Accessibility
Who Should Visit Osaek Hot Springs
Osaek Hot Springs suits adults and older teenagers seeking a traditional Korean mountain hot spring experience in a quiet, naturally beautiful setting. The Osaek valley is comparatively peaceful, drawing Korean domestic visitors rather than large tour groups. It is especially popular in autumn, when the Seoraksan valley fills with early fall foliage, usually in the first two weeks of October.
The bathing areas are gender-segregated and require nudity in line with standard Korean hot spring practice. Swimwear is not worn in the main bathing pools. Co-ed dry saunas are available for an additional fee in regular clothing. The facility recommends alternating between the heated baths, the carbonated spring pools, and the saunas, with rest periods in seven themed rooms including ocher, salt, herbal medicine, and ice rooms. Each pool is labeled with temperature and pH.
Osaek suits visitors combining the hot spring with hiking on Seoraksan's southern trails. The setting and older facility style appeal to those who prefer a low-key, unhurried atmosphere; visitors expecting a modern resort complex should note the facility's age and traditional character. For family hot springs near Sokcho in a mountain setting with direct national park trail access, Osaek is the most accessible option on the southern Seoraksan side. Overnight stays at the Greenyard Hotel make it easy to visit trails in the morning and the springs in the evening.
Safety & Etiquette
Osaek Hot Springs Safety Tips
Osaek Hot Springs pools reach 43 degrees Celsius. Limit time in the hottest pools to 10 to 15 minutes and take cool-down breaks in the 27-degree carbonated pools between sessions. The facility posts a recommended visiting sequence on-site; following this guide is a practical way to pace the visit safely. Drink water regularly throughout your visit to stay hydrated.
A thorough shower before entering any pool is required, following standard Korean hot spring etiquette. Each pool is labeled with temperature and pH; check before entering. The carbonated spring pools are at approximately 27 degrees Celsius and are not hot baths; do not enter expecting warmth. The carbonated water causes a mild fizzing sensation on skin, which is normal.
The Osaek area is in a mountain valley at 500 metres elevation. Temperatures run several degrees cooler than the coast even in summer; in autumn and winter, the valley becomes cold rapidly after sunset. Bring warm clothing for the walk between the hotel and parking areas or trailheads. The road to Osaek is a mountain road with curves; drive carefully in wet or icy conditions.
Pregnant visitors and those with cardiovascular conditions, high blood pressure, or circulatory issues should consult a healthcare provider before use. The basement-level pools are reached via stairs within the hotel building; there is no confirmed wheelchair access. Visitors with skin conditions should note that the iron-rich, carbonated water may interact differently with sensitive skin compared to standard alkaline springs.
