Hallasan hike: reservations, trails and cut-off times for 2026

Hallasan is the 1,950 m volcano that fills the middle of Jeju, and the summit hike is the one day of a Jeju trip that cannot be improvised. The trails to the crater lake run on a reservation system, with entry and summit cut-offs that decide whether you can start at all. See also the Jeju-do travel guide and South Korea.

Everything below comes from the Hallasan reservation site run by the national park office and from the Visit Jeju and Korea Tourism Organization pages. Rules change by season and by notice, so treat the times as a snapshot for October 2026 and read the park's notice board the week you go. The fee table is on the park page.

Reservations open at 09:00 on the first working day of each month for the following month, and the calendar runs to the end of that following month. A hike planned for any day in November, for example, can be booked from the first working day of October. The park treats weekends and public holidays as non-working days, but local holidays count as working days for this purpose, so the opening day can fall a day or two after the 1st. The system has an English option, and the park office answers calls on weekdays during office hours.

Opening day is the hard part. The park applies a queue system to avoid overload, so a waiting number does not guarantee a slot: popular dates can sell out while you wait, and the status page is hidden on opening day and returns afterward. The system is also taken offline for maintenance between 20:00 and 22:00 on the evening before opening and on opening day itself. In practice, that means you should have an account ready, know your preferred date and a fallback date, and enter an accurate phone number before the clock hits nine.

Three details catch people out. First, a booking without personal details entered stays incomplete and is canceled automatically after one day. Second, there is no waiting list, so a sold-out date stays sold out until someone cancels. Third, the park applies a penalty for no-shows: skipping a reserved hike without canceling bars you from booking for three months the first time and for a year the second time. Cancel through the same login you booked with, before your reserved window ends, and do the same for any person who drops out of a group.

A reservation is also a safety record. The QR code sent after booking is what opens the gate at the trailhead, so keep the phone charged and the message saved offline. Mountain signal can be patchy, and a screenshot is a cheap backup.

Seongpanak, on the east side, is the longer and gentler route. The park lists 9.6 km one way from the trailhead at 750 m: 7.3 km to the Jindallaebat shelter and 2.3 km more along the east ridge to the summit. The official time is about 4.5 hours up and about nine hours for the round trip, with a mostly forested approach and the crater lake only at the very end. A side path leaves the main trail at about 5.8 km and climbs 600 m to Sara Oreum, a crater lake with a viewpoint. The park describes the gradient as gentle but warns that walking about 19 km in a day demands pacing.

Gwaneumsa, on the north side, is the second summit route. Visit Korea's national park hiking article describes the full crossing from Seongpanak down to Gwaneumsa as 18.5 km and about 10 hours, and the park confirms you can descend by the other trail. That crossing is the classic Hallasan day for strong hikers, but it needs a car or a taxi plan at the far end, because the two trailheads are on opposite sides of the mountain.

If you want the simplest day, book Seongpanak and return the same way. The route is well signed, has two shelters and toilets, and avoids the need to move a car. Choose the Seongpanak-to-Gwaneumsa crossing only if you are confident about distance and have the logistics sorted. Anyone who has not hiked for years should read the next section first, because the park itself recommends easier trails for people without recent hiking experience or with health conditions.

Hallasan operates on a same-day principle: you must finish before sunset, so the park closes the trail to new entrants at midday and turns people around at the summit in early afternoon. The Seongpanak page lists trail opening from 05:00. From October to March, the trail entrance and the Jindallaebat checkpoint close at 11:30; from April to September they close at 12:30. At the summit, the time by which you must start down is 13:30 from October to March and 14:30 from April to September. The park's separate reservation page shows a different table with a middle shoulder season, so check the live notice for the date you book, and plan to be at the gate at opening anyway.

The arithmetic is simple. If the upward walk takes about 4.5 hours and the summit turnaround is 13:30 in the cool months, a start at 05:00 leaves comfortable margin, while a 08:30 start leaves almost none. Do not treat the checkpoint time as a goal. It is the last moment at which the park will let you pass, and walkers who arrive at the shelter just before it face a hard turn-around.

There is no shop on the Seongpanak trail, according to the park. Carry all the water and food you need, plus a layer for the summit, where the air is thinner and cooler. Toilets are at the trailhead office, at the unstaffed Sokbat shelter and at the staffed Jindallaebat shelter. The park warns of hornets in summer and of exhaustion or leg injuries on the way down, and it recommends hiking in a group.

The Seongpanak parking lot holds 156 cars, according to the park page, and it fills early. A free alternative park-and-ride lot is on the 5.16 road near Jeju International University, with 199 spaces. If you drive, remember that a foreign visitor needs an International Driving Permit alongside a home license; the international driving permit guide covers the rule, and the Korea Tourism Organization is the place to check driving guidance before you rent.

Without a car, the park lists two bus options. Bus 281 runs between the Jeju bus terminal and the Seogwipo bus terminal along the 5.16 road, with a first departure at 06:00 and a last at 22:00 and gaps of 10 to 17 minutes, taking roughly 45 to 50 minutes end to end. Bus 181 connects Jeju International Airport with the 5.16 road and Seogwipo World Cup Stadium, with its first departure from the airport at 06:10, a gap of 30 to 45 minutes and about 35 minutes to the Hallasan stop. Both timetables come from the park page and can change, so confirm them on the day.

The early start matters here. A 05:00 trail opening is hard to match by public bus from Jeju City, so the realistic choices are a taxi, a rental car or a night spent close by. If you base yourself in the city or on the south coast, the where to stay in Jeju guide compares the options by transfer time.

Sold-out dates are common in autumn, so have a plan B. The park's homepage lists the reservation status for each summit trail by day, and it also offers a first-come reservation menu, so check both close to your date rather than assuming the answer from opening day. Cancellations free slots back into the pool.

The park's own advice for people without recent hiking experience, or with a heart or other medical condition, is to use the Eorimok and Yeongsil trails, which climb to about 1,700 m rather than the 1,950 m summit. Those routes still deliver the open crater-rim scenery above the forest and suit a half day. Beyond the mountain, Jeju has volcanic scenery that needs no permit. The east coast day combines Seongsan Ilchulbong, Udo and a lava tube, and Seogwipo has the waterfalls and the southern coast.

Do not hike on a bad forecast to save a booking. The park can close trails fully or partly when the weather service issues heavy rain, typhoon or heavy snow warnings, and it asks you to check the control status on the day. Typhoon season runs roughly from June to November according to the UK government, so a September or October reservation carries real weather risk. Choose cancelable stays and check the forecast the night before.

The summit day is about 19 km on foot, the air thins toward the top, and the park reports that visitors with heart conditions have often needed help there. If you have not walked six or seven hours in a row recently, are traveling with young children, or are recovering from an injury, choose a shorter trail. If your trip is three days or less, the summit may also eat the one clear-weather day you need for the coast. A good compromise is the Sara Oreum side trip, which adds a crater lake and a viewpoint without the final climb, though it still counts as a long day on the Seongpanak trail.

The first mistake is waiting until the week before the hike to look at the calendar, because slots are released a month ahead. The second is booking and not canceling, which risks a three-month ban. The third is arriving at the trailhead after the entrance cut-off, which is as early as 11:30 in the cool months. The fourth is carrying too little water for a trail with no shop. The fifth is assuming a cell signal will show your QR code, when a saved screenshot is safer. The last is ignoring the mountain's own safety line: the park information number is +82 64 710 9950, and 119 is the national ambulance number.

A hike of this length belongs in a trip that is insured for walking in mountains, so compare cover in the travel insurance guide and check that medical evacuation is included. Navigation on Jeju is easier with data, and the phone and data guide compares eSIMs against local SIMs before you fly. Visitors from many countries are exempt from the K-ETA until 31 December 2026, and the UK government notes an e-Arrival card can be submitted online up to 72 hours before arrival; the K-ETA explained page covers who needs what.