Four gates, four one-way routes
Ganghwa publishes four routes and states each one as a one-way distance to the summit. The Stair route is 2.4 km in 1 hour 15. The Dangun route is 3.6 km in 1 hour 50. Hamheodongcheon is 2.8 km in 1 hour 30. Jeongsusa is 1.7 km in 1 hour 40.
The first two share the main ticket office; the other two have their own gates on the eastern side and merge near the top, at a flight called the Chilseonnyeo steps.
Being one-way figures, they describe getting up rather than getting back. Most people come down the way they went, and the county operator publishes the round trips to match: the Stair route at 4.8 km and 2 hours 30, the Dangun route at 7.2 km and 3 hours 30. Those are the one-way numbers doubled, which is a useful sign that the figures are consistent.
You can also cross over
The four routes are really four segments of the same web, and the county operator lists the crossings you can make by combining them: up the Dangun route and down to Hamheodongcheon is 6.4 km in three hours; up the Dangun route and down to Jeongsusa is 5.3 km in 3 hours 30.
Check those against the one-way figures and they come out exactly — 3.6 plus 2.8 is 6.4, and 3.6 plus 1.7 is 5.3.
A crossing needs two cars or a taxi, since the gates are a drive apart. What it buys you is a different descent, and on this mountain the descents differ more than the ascents.
Why the shortest route is the hardest
Jeongsusa is 1.7 km and takes 1 hour 40. Nothing else in this guide comes close to that pace. For comparison, the Dangun route gets you more than twice as far in the same time.
Ganghwa does not publish a warning about it. What it does is put the word for a rock section into the route description itself, between the ticket office and the Chilseonnyeo steps, and then a rock ridge above that. Those are place names rather than hazard notices — but a route that averages a kilometre an hour is telling you something without needing an adjective.
We rate it at our hardest grade and the other three a step below. All four are steeper than 472 metres implies.
Two clocks, and they do not explain each other
This is the part to get right before you go.
Chamseongdan, the altar at the summit, is listed as open 10:00 to 16:00. Separately, Ganghwa bars entry to the trails after 16:00 in winter. The two appear one under the other in the same box on the county page, with nothing said about how they relate.
The trail opening time is worse: 07:00 on some county pages and 09:00 on others, including in two places on the mountain’s own site, and no source says which applies. Every stated closing time on this mountain is 16:00 or earlier, and the longest route takes an hour and fifty minutes each way.
Plan to be off the summit by mid-afternoon and none of it matters.
Ice closes it; fire season does not
Most Korean mountains in this guide shut for the spring and autumn fire-risk seasons. Manisan does not. Ganghwa’s notice sets those periods — 1 November to 15 December, and 1 February to 15 May — but the attached schedule lists all four Manisan routes as open, with nothing in the remarks column, and no land in the surrounding township appears in the restricted-entry register.
What does close it is ice. A notice in February 2024 shut the trails from the 24th to the 28th for snow and ice. In falling snow the county has allowed entry only to walkers carrying a lantern and crampons. These come by individual notice rather than on a calendar, so a winter trip needs checking rather than planning.
The altar
Chamseongdan is a designated Historic Site of 5,774 square metres, managed by Ganghwa county. The national heritage register dates the designation to 11 July 1964. Ganghwa’s own history page says 1986; we follow the register and flag the difference rather than quietly choosing.
It is not a ruin. A rite is held there every year on 3 October, National Foundation Day, and the flame for the National Sports Festival is kindled at the altar from sunlight. You can walk up to it — Ganghwa notes that the inside of the altar itself may be closed off, which is a different thing from the summit being closed.
What it costs, and getting there
Admission is 2,000 won for an adult, 1,000 for youth and military, 700 for a child. Groups of twenty or more pay 1,500, 800 and 500. Two separate county channels publish the same figures, which is reassuring on a mountain where other things disagree.
Parking is free. Navigate to the Manisan public car park at 405-4 Sangbang-ri, Hwado-myeon; the county lists 500 spaces, though only one page says so.
Ganghwa is reached from Seoul by intercity and metropolitan bus, and the mountain is at the southern end of the island from the town. The last leg to the gate comes from a single official page, so confirm it if you are travelling without a car.
One warning about course numbers
Ganghwa runs more than one numbering scheme for these routes and they do not agree with each other. One county page has the Stair route as number one; the mountain’s own FAQ calls the Dangun route number one. A third publication numbers four routes as one, two, three and five, with no four.
The names are stable even where the numbers are not. Ask for the Stair, Dangun, Jeongsusa or Hamheodongcheon route and everyone will know what you mean.
Who it suits
Take the Dangun route if you want the summit with the least trouble: 3.6 km, 1 hour 50, and the county’s own recommendation. Take the Stair route if you would rather get it over with in 2.4 km and do not mind a very long staircase.
Take Jeongsusa only if the hard ground is the point. And if you can arrange two cars, go up one side and down the other — the crossing figures are published, they check out, and you see a different mountain on the way down.