What the Wall Is and When It Was Built
Seoul City Wall (한양도성), also called Hanyangdoseong, was built to encircle Hanyang — Seoul's name under the Joseon dynasty — starting in 1396. The main construction phase ran 98 days, split between a winter and a summer shift, and mobilized close to 200,000 laborers across 97 wall sections. The original wall combined rammed earth on flat ground with stone on the mountains; by 1422 the earthen sections had all been rebuilt in stone, and a major restoration followed in 1704 after parts had collapsed over time. It runs 18.6km along the ridges of Seoul's four inner mountains — Bugaksan (Baegak), Naksan, Namsan (Mongmyeoksan), and Inwangsan — standing between 5 and 8 meters high. About 78% of the wall survives today, according to the wall's official website. It currently sits on UNESCO's World Heritage Tentative List (last updated there in January 2023) rather than being fully inscribed, so don't expect World Heritage signage on-site yet.
The Gates
Eight gates were originally built: four great gates — Heunginjimun (east, also called Dongdaemun), Sungnyemun (south, also called Namdaemun), Donuimun (west), and Sukjeongmun (north) — and four smaller gates: Hyehwamun, Souimun, Gwanghuimun, and Changuimun. Donuimun was demolished entirely during the Japanese colonial period and only its site remains today. Both Gwanghuimun and Hyehwamun were rebuilt near, but not exactly on, their original locations — Gwanghuimun moved about 15m south of its original site in a 1975 reconstruction, and Heunginjimun itself was rebuilt in 1869. Sungnyemun, the most famous gate, was rebuilt again after a 2008 arson fire and reopened in May 2013. The wall's official pages don't give a complete original-versus-rebuilt inventory for every remaining gate beyond these details.
Six Named Sections, Not Four
The wall's official website divides the route into six walking sections, each with its own start and end point, distance, and estimated time:
- Baegak Mountain Trail — Changuimun Gate to Hyehwamun Gate, 4.7km, about 3 hours, crossing Baegak (342m), the tallest of the four inner mountains.
- Naksan Mountain Trail — Hyehwamun Gate to Heunginjimun Gate, 3.2km, about 1 hour, over Naksan (124m), the lowest of the four.
- Heunginjimun Gate Trail — Heunginjimun Gate to Jangchung Gymnasium, 1.8km, about 1 hour, the lowest-elevation stretch of the whole wall.
- Namsan (Mongmyeoksan) Mountain Trail — Jangchung Gymnasium to Baekbeom Square, 6.7km, about 3 hours, passing N Seoul Tower and the marked center point of Seoul.
- Sungnyemun Gate Trail — Baekbeom Square to the site of Donuimun Gate, 1.8km, about 1 hour.
- Inwangsan Mountain Trail — the site of Donuimun Gate to Changuimun Gate, 4.0km, about 2 hours 30 minutes, closing the loop back to the start.
The official site rates difficulty on a one-to-five-star scale: Heunginjimun and Sungnyemun are one star (easiest), Naksan is two stars, Namsan three stars, and Inwangsan the maximum five stars, for its rocky scrambling.
Naksan, Namsan, Inwangsan, and Baegak in Detail
Naksan (낙산) is the gentlest stretch, nicknamed the "Montmartre of Seoul" for its hillside views — the official course notes promise "splendid views of the sunset and Seoul at night." It runs past Ihwa Village's murals, and signage asks hikers to stay quiet out of respect for residents along Bukjeong Village.
Namsan (남산), called Mongmyeoksan on the official course, is the longest single section at 6.7km, passing the National Theater of Korea, the city's marked central point, N Seoul Tower, and the old Mongmyeoksan beacon-mound site once used for fire-signal relays. (For the park facilities around Namsan — the tower, cable car, and hiking steps — see our separate Seoul parks guide.)
Inwangsan (인왕산) is the hardest and most dramatic stretch, rated five stars out of five, passing the Chimabawi and Seonbawi rock formations, Guksadang shrine, and the Yun Dong-ju Literary Museum (open 10am–6pm in summer, 10am–5pm in winter, closed Mondays and major holidays). The official course guidance warns that the mountain "has many rocky sections" and tells visitors to "take extra care, especially in winter."
Baegak (백악산), also called Bukaksan, is the tallest section and, historically, the most sensitive — its route runs closest to the area around the presidential compound. According to the wall's official history pages, this section was closed to the public for about forty years after a 1968 North Korean special-forces infiltration was traced through the mountain, and it reopened to the public only in 2007. On the official Hanyangdoseong website's current course pages, there is no mention of needing an ID card, passport, or advance registration to walk this section today — it's simply listed as open 24 hours a day, seven days a week, with no security-related caveats. That's what the source shows as of now; access rules at sensitive sites can change, so it's worth confirming with on-site signage before you go rather than treating this as a permanent guarantee.
Getting There
- The Baegak Mountain Trail starts near Changuimun Gate, reachable from Gyeongbokgung Station, and ends at Hyehwamun Gate, near Hansung University Station.
- The Naksan and Heunginjimun sections meet at Heunginjimun Gate, near Dongdaemun Station (Lines 1 and 4, Exit 1).
- The Namsan trail touches Chungmuro, Dongguk University, Hoehyeon, and Myeongdong stations, plus the Namsan shuttle bus routes.
- Sungnyemun Gate is walkable from the City Hall/Myeongdong area, though the official pages don't name a specific exit for this stretch.
- The Inwangsan trail ends back at Changuimun, near Gyeongbokgung Station, closing the full loop.
What You'll See and What to Bring
Beyond the gates themselves, the route passes the Ogansumun and Igansumun water gates built to drain the old city (near Heunginjimun), the Dongdaemun History and Culture Park's excavated wall sections, Namdaemun Market (trading since January 1897 and described on the official site as Korea's first permanent urban market), the former Russian Legation site where King Gojong took refuge for a year starting in February 1896, and Chungdong First Methodist Church, Korea's first Methodist church. Wear real walking shoes — the Namsan and Inwangsan stretches climb genuine hills, and Inwangsan's rock sections get slick when wet or icy. None of the official course pages mention water fountains or food stalls directly on the route, so carry your own water, especially on the longer Baegak and Namsan legs.
What I Could Not Verify
The official wall website makes no mention of a stamp tour, completion badge, or certificate program for people who walk the whole loop — if one exists for Hanyangdoseong, it isn't documented on any page I could reach. I also could not confirm current-day ID or registration rules for the Baegak/Bukaksan section beyond the absence of any such requirement on the official course pages; treat that as "not currently documented," not as a guaranteed "no restrictions ever." And beyond Gwanghuimun and Hyehwamun's confirmed reconstructions and Donuimun's confirmed loss, the source doesn't give a complete gate-by-gate original-versus-rebuilt breakdown.