Seoul has a national park inside its city limits. That is not a marketing line — Bukhansan National Park is served by the subway, and on an autumn Saturday the trains north are full of people in hiking gear before eight in the morning. Three mountains do most of the work for visitors: Bukhansan, Inwangsan and Gwanaksan. All three are day hikes. None needs a permit, a guide or a car.
| Mountain | Height | Round trip | Exertion | Shade | Leaving early |
|---|---|---|---|---|---|
| Bukhansan (Baegundae) | 836 m | 4–6 h | High — sustained climb, rock and cables near the top | Good below the ridge, none above | Hard once committed |
| Gwanaksan | 632 m | 4–5 h | Moderate–high — long, rocky upper section | Good on the approach | Hard once committed |
| Inwangsan | 338 m | 2–3 h | Moderate — short but steep, granite slabs | Very little — bare rock | Moderate |
| Namsan | 270 m | 1–2 h | Low — paved paths and stairs | Good — wooded | Easy; cable car available |
Heights are published figures. Times, exertion and shade are our editorial assessment for trip planning, not measurements. If a clinic has given you activity restrictions, read these against that advice — see treatments that don’t cost you a hiking day.
Bukhansan — the big one
Baegundae, the main summit at 836 m, is the highest point around Seoul and the closest thing the city has to a real mountain day. The last stretch is bare granite with fixed cables and a queue at weekends, and the summit view covers the entire basin the city sits in.
Reckon on four to six hours round trip depending on the route and how long you wait at the top. Start early — the park enforces seasonal entry cut-offs and rangers do turn people back.
If the summit sounds like more than you want, the park has its own dulle-gil: a long low-level ring around the base, divided into short numbered sections, with temples and villages on the way and no scrambling at all. Same forest, same air, a fraction of the effort.
Inwangsan — the best short hike in Seoul
At 338 m, Inwangsan is barely a mountain by most standards, and it is still the hike we would recommend first to someone with half a day. The rock is bare and pale, the path climbs quickly, and you get a straight view down onto the palace district and across to Namsan.
It also carries a stretch of the old city wall, so an Inwangsan walk doubles as a section of the Seoul City Wall Trail. Two to three hours, trailheads a short walk from the subway on the west side of the centre.
Gwanaksan — the local favourite
Gwanaksan rises on the southern edge of the city at 632 m. It sees fewer foreign visitors than Bukhansan and more Seoul residents, which tells you something. The upper section is rocky and there is a small temple perched near the top. Four to five hours, with approaches from both the Seoul and Gwacheon sides.
Namsan — when you have two hours
Namsan is in the middle of the city and is more park than mountain, but the climb is real enough to count and the paths are paved the whole way. It is the sensible choice in bad weather, after dark, in unsuitable shoes, or on a day you are not up to much. A cable car runs if you would rather not walk up at all.
Choosing by how much time you have
- Two hours — Namsan, or the Naksan section of the city wall
- Half a day — Inwangsan, or the Baegak wall section
- A full day, and you want a summit — Bukhansan Baegundae or Gwanaksan
- A full day, and you do not want a summit — Bukhansan Dulle-gil
Practical notes
- Getting there — every mountain here is on the subway or a short bus from it. A transport card covers the whole journey.
- Crowds — autumn weekends on Bukhansan are genuinely busy. Weekdays are quiet everywhere.
- Winter — trails stay open and stay busy, but granite ridges ice over. Crampons are normal on Bukhansan and Gwanaksan.
- Food — trailhead villages are lined with restaurants. Carry water; buy lunch after, not before.
- Cut-off times — national park sections close at dusk on a published seasonal schedule. Check it if you are starting after lunch.
Where to go next
- Hiking in Korea — why the mountains here are day-sized
- The Seoul City Wall Trail — 18.6 km over four of these peaks
- What a dulle-gil is
- Galmaetgil — the Busan equivalent, at sea level
In an emergency
Korea has two emergency numbers, and both answer in English.
- 119 — fire, rescue and ambulance. This is the one to call for an injury on a trail.
- 112 — police.
Korean trails carry numbered rescue markers — small posts with a code on them. Reading that code to the operator locates you far faster than describing the scenery. Note the last one you passed.
Mobile coverage is good on almost all the routes described here, including the ridges.
Park access hours, seasonal closures and trail conditions change. Times given are planning estimates for an average pace; check the current notice from Korea National Park Service before you set out.
Closures are the thing worth checking
Korean trails close, and not only for weather. National park ridgelines shut during the spring and autumn fire-risk periods, coastal sections close for construction or erosion, and some routes run on fixed opening hours rather than dawn to dusk. These are published by the managing authority and almost never by the blogs describing the walk.
Distances and difficulty ratings are worth taking from the official course data too. The national walking trail portal publishes track files and an assigned difficulty grade, which is a steadier basis for planning a day than someone else’s impression of how hard it felt.