By Lee
Jeju Island Hiking Guide: The Best Trails, Nature Spots and Outdoor Activities
Hallasan summit permit, Olle Trail routes 7 and 10, lava tubes, waterfalls, Udo Island snorkeling — the complete Jeju outdoor and hiking guide.
People who visit Jeju Island multiple times often say, "At first, I only saw the sea, but from the second visit, I started hiking the mountains." I was the same. After my first trip to Jeju, where I just visited cafes, beaches, and tried black pork, I felt like I missed something essential. It was only on my second visit that I truly saw Jeju's real face — the crater view from the summit, waterfalls crashing into the waves, and the darkness created by centuries-old trees.
Jeju is the island with the most diverse natural ecosystems in Korea. From Hallasan, the highest peak in South Korea at 1,950 meters, to some of the world's longest lava tubes, Asia's only waterfall that falls directly into the sea, and volcanic landscapes designated as UNESCO World Natural Heritage sites — honestly, even a week isn't enough to fully enjoy Jeju's nature. It's still amazing to think that such a world is just an hour's flight from Seoul.
This guide is organized for foreign travelers who want to walk and feel Jeju's nature. From climbing Hallasan's summit to coastal trekking, exploring lava caves, and day trips to small islands — it includes practical information and tips for each spot, allowing both hiking beginners and trekking enthusiasts to tailor their itinerary.
When to Visit Jeju for Nature Travel
The best time for hiking in Jeju is spring (March to May) and autumn (September to November). In spring, cherry blossoms and azaleas bloom on the mid-slopes of Hallasan, attracting hikers. During the azalea season on Hallasan (usually mid-May), the Yeongsil course area turns pink, which is one of the most beautiful mountain scenes I've ever seen. In autumn, the silver grass and autumn leaves create a spectacular view, and the weather is often clear, offering great visibility.
Summer (June to August) is lush and beautiful, but it coincides with the heatwave and typhoon season. If you plan to climb Hallasan, I strongly recommend starting early in the morning and descending by noon. Waterfalls and valleys are cooler and more dynamic in summer.
Winter (December to February) is when Hallasan transforms into a snowy wonderland. The snow-covered summit is breathtaking, but trails may be closed during bad weather. The summit routes towards Witseoreum and Donnaeko require advance reservations, so check the official Hallasan website beforehand. Olle Trails and lowland attractions can be enjoyed year-round, and the off-peak winter season allows for a quieter experience.
Hallasan Mountain — Climbing South Korea's Highest Peak
Hallasan is not just a mountain. At 1,950 meters, it's the highest peak in South Korea and the pillar that runs through the entire island, encapsulating Jeju's nature. The view from the Baengnokdam crater at the summit is truly indescribable. On a lucky day, you can stand above the clouds and have the entire island at your feet.
Major Climbing Routes Comparison
There are five main trails on Hallasan. Choose based on your goals and fitness level.
- Seongpanak Trail: The most popular route. 9.6 km one way, about 9-10 hours round trip. It's relatively gentle among the routes that reach Baengnokdam summit. Recommended for first-timers.
- Gwaneumsa Trail: 8.7 km one way, about 9-10 hours round trip. Rougher than Seongpanak but offers beautiful views of dense forests and valleys. Reaches the summit and is more satisfying for experienced hikers.
- Yeongsil Trail: 5.8 km one way, about 3-4 hours. Only reaches the Witseoreum shelter, not the summit. Instead, it offers stunning views of the Obaeknahan rock formations and Byeongpungbawi cliffs. Choose this route if you prefer scenery over reaching the summit.
- Eorimok Trail: 4.7 km one way, about 2-3 hours. The gentlest route to Witseoreum. Suitable for children or family hikes.
- Donnaeko Trail: 9.1 km one way. Less crowded southern route. Advance reservation required for summit access.
Summit Climb Reservations and Control Times
Advance internet reservation is required for the summit routes towards Witseoreum (via Seongpanak and Gwaneumsa) and Donnaeko. The number of daily visitors is limited (1,000 per day for Seongpanak), so it's recommended to book at least 2-3 weeks in advance. Reservations can be made through the Hallasan National Park official reservation system (visithalla.jeju.go.kr).
Trail control times vary by season. For Seongpanak and Gwaneumsa trails, you must enter between 5 AM and 12 PM in summer (March to September) and between 6 AM and 12 PM in winter (December to February). Entry is not allowed after these times. There is also a descent control time (usually around 2 PM), so make sure to start early in the morning.
TIP: There is parking at the Seongpanak trailhead, but it fills up early in the morning. It's more reliable to take the intercity bus (No. 181) from Jeju City to Seongpanak or take a taxi. If aiming for the summit, leave the starting point by 6 AM at the latest. Be sure to bring hiking boots, a waterproof jacket, at least 2 liters of water, and snacks.
Jeju Olle Trail — Walking Along Jeju's Coast
The Olle Trail is a series of 26 walking routes totaling about 437 km that connect Jeju's coastline and interior. Created in 2007 by Jeju native Suh Myung-sook, inspired by Spain's Camino de Santiago, it has become an icon of Jeju travel. Each course is marked with blue and yellow ribbons (ganses) and arrows, making it easy to follow without a map.
Each course has a different character, so you can choose based on your walking purpose and fitness. Among the 26 courses, two are especially recommended for first-time visitors.
Route 7 — From Oedolgae to Wolpyeong Village
This course is often rated as the most beautiful among the Olle Trails. Starting from Oedolgae (a solitary rock off the coast of Seogwipo), it follows the Seogwipo coastal cliffs for about 17.6 km (5-6 hours to complete). It encapsulates the essence of southern Jeju, from the transparent waters of Hwangwooji Coast to the tranquil fishing village of Beophwan Port and the distant view of Sanbangsan. If walking the entire route is daunting, even just walking from Oedolgae to Lee Jung-seop Street in Seogwipo is satisfying.
Route 10 — From Hwasun to Moseulpo
About 15.6 km (5 hours to complete), this route offers the best views of the southwest coast's cliffs and lava formations. It passes by Sanbangsan and Yongmeori Coast, with a dramatic section along the coastal cliffs next to the Songaksan crater. It's manageable for Olle Trail beginners, with small ports and cafes along the way for breaks. Once you reach Moseulpo Port, you can catch a boat to Marado Island.
TIP: You can collect stamps with an Olle Passport, which can be purchased at the start of each Olle Trail course (ganses stamp box). If you collect stamps from all 26 courses, you can receive a completion certificate from the Jeju Olle Office. The passport is available for ₩3,000 at Jeju Olle Information Centers or course information booths.
Jeongbang Waterfall — A Waterfall Falling into the Sea
Jeongbang Waterfall is the only waterfall in Asia that falls directly into the sea. The 23-meter-high and 8-meter-wide stream cascades down a basalt cliff into the Seogwipo sea, creating a unique sight only found in Jeju. The concept of a "sea waterfall" is rare, making the first impression quite impactful. It's about a 10-15 minute walk from downtown Seogwipo, making it easily accessible.
From the ticket office, you can descend the steps to stand on the beach right in front of the waterfall. The sound of the waves and the waterfall together is much more overwhelming in person than in photos. Legend has it that the Chinese Emperor Qin Shi Huang's envoy, Seobul, came here in search of an elixir of immortality, and the words "Seobul Gwacha" (Seobul passed here) are said to be inscribed on the cliff rocks. Admission is ₩2,000 for adults. During the summer peak season, visiting early in the morning (right after opening) allows you to enjoy the waterfall without the crowds.
Cheonjeyeon Waterfalls — The Mystery of Three-Tiered Falls
Cheonjeyeon means "The Pond of the Emperor of Heaven," and it is a three-tiered waterfall. Each tier has a different water color and atmosphere, giving you three distinct experiences in one place. The pond in front of the first waterfall is especially clear on sunny days, earning the nickname "Fairy Pond" from locals. The pond is 21 meters deep, making the bottom invisible.
Located within the Jungmun Tourist Complex, it's easy to access, and the Cheonjeyeon Rainbow Bridge connecting the waterfalls is a famous photo spot. The view of the gorge from the bridge is also impressive. The entire trail is about 1.5 km and can be leisurely walked in 1.5 to 2 hours. Admission is ₩2,500 for adults. Since it's not close to Jeongbang Waterfall, plan separate visits, or structure your day as Seogwipo City → Jeongbang Waterfall → lunch → Jungmun → Cheonjeyeon.
Manjanggul Lava Tube — UNESCO Lava Cave
Manjanggul is one of the world's longest lava tube systems, stretching 7.4 km. Designated as a UNESCO World Natural Heritage site in 2007, this cave was formed about 300,000 years ago by volcanic activity. As lava flowed, the outer layer solidified while the hot lava inside flowed out, creating a tunnel — it's like walking through the Earth's formation process underground.
The section open to the public is about 1 km long, but inside is a 7.6-meter-high lava column. This is one of the largest lava columns in the world, formed by lava flowing down from above and solidifying from below. The cave interior has sections with ceilings 5-7 meters high and others low enough to require bending over.
The cave maintains a temperature of 11-21°C year-round, making it a natural air conditioner in summer and a warm refuge in winter. It is lit to some extent, but the floor is wet, so non-slip shoes are essential. Admission is ₩4,000 for adults. It's conveniently located for a day trip with Seongsan Ilchulbong on a tour of eastern Jeju (about a 30-minute drive from Seongsan Ilchulbong).
TIP: The cave is colder and more humid than expected. Even in summer, bring a light long-sleeve shirt. Moisture can easily condense on camera lenses, so consider using a smartphone or applying anti-fog treatment before entering. The cave's darkness and unique formations make for interesting video footage.
Seongsan Ilchulbong — UNESCO Volcanic Landscape
Seongsan Ilchulbong is a 179-meter-high tuff cone at the eastern tip of Jeju. Formed about 5,000 years ago by underwater volcanic activity, this unique landscape was designated a UNESCO World Natural Heritage site in 2007. As its name "Ilchulbong" suggests, the sunrise view from the summit is one of Jeju's most famous sights. It's a top spot for sunrise photography year-round, and thousands gather here on New Year's Day to watch the first sunrise.
It takes about 20-30 minutes to climb the stairs to the summit. The slope is quite steep, but the stairs are well-maintained, so you can climb without hiking gear. From the summit, the crater rim formed by 99 rocks spreads out like a crown. The crater is still filled with green plants, resembling a giant natural amphitheater. On clear days, you can see Udo Island clearly. Admission is ₩5,000 for adults. Since it's close to Seongsan Port, where boats to Udo Island depart, plan a day trip combining Seongsan Ilchulbong and Udo.
TIP: Sunrise times vary by season. In summer (June to August), it starts around 5:30 AM, and in winter (December to February), around 7:20-7:30 AM. Arrive 30-40 minutes before sunrise to secure a spot at the summit. The wind is quite strong at the top, so bring a windbreaker jacket. The parking lot near Seongsan Ilchulbong is very crowded during peak season, so use public transportation if possible.
Bijarim Forest — The Forest of a Thousand Years
Bijarim is a forest densely populated with about 2,800 nutmeg trees (Torreya nucifera) aged between 500 and 800 years. It's known as the world's largest single-species nutmeg forest, covering an area of about 448,000㎡. Entering the forest feels like stepping into a timeless tranquility. The dense canopy blocks sunlight even in midsummer, keeping the forest interior cool. These nutmeg trees are said to be descendants of those that supplied nuts to the royal family during the Joseon Dynasty.
There are two walking trails: a 3 km trail (Course 1, about 1.5 hours) and a 1 km trail (Course 2, about 30 minutes). The trails are flat dirt paths, so you can walk them in light sneakers. In the middle of the forest stands the "Millennium Nutmeg Tree," estimated to be 820 years old. Standing beneath it makes you realize the small scale of human life. The high phytoncide concentration makes it popular for forest bathing. Admission is ₩3,000 for adults. Start your day with fresh air and recharge your body and mind by beginning your eastern Jeju tour at Bijarim.
Udo Island Day Trip — Biking and Snorkeling
Udo is a small island about a 15-minute ferry ride from Seongsan Port. It's known as the largest and most beautiful island off Jeju's eastern coast. The most popular way to explore is by electric bike or scooter. The island circuit is about 17 km, which takes 2-3 hours by electric bike. Vehicles are restricted, making the island feel more tranquil.
The highlight of Udo is the transparent emerald sea at Hagosudong Beach. On a clear day, the water is indistinguishable from Caribbean photos. From June to September, you can rent snorkeling gear to view fish and coral underwater. Equipment rental is available at shops near the beach for about ₩15,000-20,000 per day. Climb Udobong (132m) at the island's western end for views of Jeju and Seongsan Ilchulbong, which takes about 30 minutes to reach the top.
Be sure to try Udo's specialties like peanut makgeolli and peanut ice cream. There are cafes and restaurants throughout the island, with abalone dishes being a local delicacy. Ferries run from Seongsan Passenger Terminal from 8 AM to 6 PM (times vary by season). The round-trip fare is about ₩13,400 for adults (including ferry fee). Combining Seongsan Ilchulbong and Udo in one day is the classic eastern Jeju itinerary.
TIP: When renting bikes or scooters on Udo, rentals are on a first-come, first-served basis. During peak season (July-August, holidays), quickly head to the rental shop upon arrival. There are several rental shops, so if one is sold out, check nearby. Be mindful of the last ferry time (usually 6 PM) and plan your schedule accordingly.
Hallasan Hiking Gear & Winter Safety Tips
The most thorough preparation needed for Jeju nature travel is for Hallasan. Here's a checklist of basic gear and seasonal safety tips.
Basic Gear Checklist
- Hiking Boots: Waterproof trekking shoes are essential. Regular sneakers are slippery and lack ankle support, posing a risk.
- Water: At least 1.5-2L for the Seongpanak course. There are long stretches without water stations, so prepare adequately.
- Snacks: High-calorie snacks like kimbap, energy bars, and cookies. Cup noodles are available at the Jindallaebat shelter.
- Windproof/Waterproof Jacket: The summit is much colder and windier than below. Even in midsummer, a long-sleeve jacket is necessary at the summit.
- Extra Socks: Feet can get cold after passing through damp areas. A spare pair of socks helps maintain body temperature.
- Headlamp: Essential for sunrise hikes. Check battery status in advance.
- Sunscreen & Sunglasses: UV rays are stronger at higher altitudes. There's no shade near the summit.
Special Winter Precautions for Hallasan
- Bring Crampons (Chain Spikes): Between December and March, icy sections form in the upper parts of the Seongpanak and Gwaneumsa trails. Entry may be denied without crampons.
- Check Weather Conditions: Trails are fully closed during adverse weather. Always check Jeju's weather notices and Hallasan National Park's official SNS before departure.
- 3-Layer Clothing: Winter summit temperatures can drop to -10 to -20°C. A 3-layer system of base layer, windproof mid-layer, and waterproof outer layer is essential.
- Use Trekking Poles: They greatly help maintain balance on snowy and icy sections. Rentals are available.
- Battery Management: Cold drains smartphone batteries quickly. Bring a backup battery and cash (for emergency contact).
Other Must-See Natural Attractions in Jeju
If you have extra time, consider adding these places to your itinerary. They can be combined with the main attractions already introduced for a full-day course.
- Sanbangsan: A 395-meter bell-shaped volcanic mountain with the unique Sanbanggulsa cave temple at its mid-slope. It's connected to Olle Trail Route 10 and pairs well with Yongmeori Coast for a day trip. There are many cafes nearby for a break.
- Yongmeori Coast: Jeju's oldest volcanic formation, evidence of hydrovolcanic activity from 1 million years ago. Entry is restricted on rough wave days for safety, but on calm days, walking along the layered lava formations feels like exploring an alien planet's surface. Located right below Sanbangsan, it's great to visit together.
- Hyeopjae Beach: Famous for its emerald sea and views of Biyangdo beyond the western coast of Jeju. There's a pine forest behind the beach, perfect for a stroll. After visiting Bijarim, include this in your westward itinerary for a natural flow.
- Cheonjiyeon Waterfall: Although its name is similar to Cheonjeyeon Waterfall, it's a different location. Situated in the center of Seogwipo City, the illuminated Cheonjiyeon Waterfall at night offers a mysterious atmosphere unlike during the day. Include it in a Seogwipo walking course on the same day as Jeongbang Waterfall.
Once you get a taste of Jeju's nature, you'll keep coming back. I've visited Jeju seven times, and each time I discover new courses and see new faces of the seasons. Standing above the clouds at Hallasan's summit is an experience unmatched anywhere else in Korea, and walking the Olle Trail while listening to the waves washes away the fatigue accumulated in the city. The sunrise I witnessed from Seongsan Ilchulbong's summit remains one of the most beautiful mornings I've seen in Korea.
If it's your first time in Jeju, I recommend a 3-night, 4-day itinerary exploring the east (Seongsan Ilchulbong + Manjanggul + Bijarim + Udo) and the west (Olle Trail Route 7 + Jeongbang Waterfall + Cheonjeyeon Waterfall + Sanbangsan) over two days each, and challenging Hallasan on the last day. Choose the day you're in the best condition for Hallasan, as it requires significant physical exertion.
If you have questions about choosing a Hallasan course, Olle Trail weather, Udo day trip timing, or seasonal recommended courses, leave a comment. I'll reply directly.
