Hongneung Arboretum Seoul: Opening Days, Seasons and How to Get There

Short answer: Hongneung Arboretum is a large, free research forest in Dongdaemun-gu, eastern Seoul, run by the National Institute of Forest Science. Individual visitors are generally welcome on weekends, while weekdays are mainly for booked guided tours and groups, so check the institute's official site before you go. It is best in spring (magnolias and cherry blossoms) and autumn (maple and ginkgo colour), and it is about a 15–20 minute walk from Hoegi or Korea University stations.

What is Hongneung Arboretum?

Hongneung Arboretum (홍릉숲, Hongneung Forest) is often described as Korea's first modern arboretum. Its research history goes back to the early 1920s, and the land itself is older still: the name "Hongneung" comes from the royal tomb of Empress Myeongseong, which stood here before it was moved to Namyangju in 1919. Today the forest belongs to the National Institute of Forest Science (NIFoS), and scientists still use it for tree and plant research.

That research role is why it feels different from a city park. There are no food stalls, no rides and no big lawns full of picnic mats. Instead you get quiet paths, labelled trees from Korea and around the world, small streams and a real sense of being in a forest, even though you are inside a busy part of Seoul.

Opening days: weekends vs weekdays

The opening rules have changed over the years, and sources disagree, so treat this as a general picture rather than a fixed timetable:

Weekends: the forest has traditionally opened to individual visitors on Saturdays and Sundays without a booking.
Weekdays: visits have usually been limited to guided forest-interpreter (docent) tours and school or group programmes that you reserve in advance.
Closures: the forest may close on some public holidays, during research work or in bad weather.
Admission: entry has been free.

Because the schedule and booking system can change from season to season, check the National Institute of Forest Science website (nifos.forest.go.kr) or the Dongdaemun-gu district tourism page shortly before your visit. If you only have a weekday free, look for the docent tour reservation page there; places are limited and fill up quickly in spring and autumn.

Best seasons to visit

Spring (late March to May)

Spring is the most popular time. Early-flowering trees such as magnolias and cornelian cherry come first, followed by cherry blossoms and then fresh green leaves. Weekends at peak blossom can be busy by Hongneung standards, but it is still far calmer than famous cherry blossom spots like Yeouido.

Summer (June to August)

The thick canopy gives real shade, which makes the forest a good escape on a hot Seoul afternoon. Bring insect repellent, as mosquitoes are common near the streams.

Autumn (October to mid-November)

Autumn colour is the other highlight. Maples turn red and ginkgo trees turn bright yellow, and the leaf-covered paths are lovely for photos. Peak colour in Seoul usually falls between late October and mid-November, depending on the year.

Winter (December to February)

Winter is quiet and bare, but the evergreen and conifer sections still look good, and a fresh snowfall can make the forest very pretty. Paths can be icy, so wear shoes with grip.

How to get there

The arboretum sits in a cluster of research institutes in Cheongnyangni-dong, Dongdaemun-gu. The main public transport options are:

Hoegi Station (Seoul Subway Line 1 and the Gyeongui–Jungang Line): walk about 15–20 minutes, or take a short local bus or taxi.
Korea University Station (Line 6): walk about 15–20 minutes, partly uphill.
Cheongnyangni Station: a larger hub with many bus connections; a taxi from here to the arboretum gate is short.

Use Naver Map or KakaoMap and search for "홍릉숲" or "국립산림과학원" to get walking directions and live bus times. Google Maps works for subway routes in Korea but is weaker for walking directions. There is little or no visitor parking, so public transport is the easiest choice.

What to see inside

Themed tree collections: sections of broadleaf trees, conifers, and trees grouped by family, many with name labels.
Streams and small ponds: quiet spots to sit, especially pleasant in summer.
The former tomb area: traces of the old Hongneung royal tomb site are part of the forest's history.
Forest Science Hall: a small exhibition space about Korea's forests next to the arboretum; check whether it is open on your date.

Most visitors spend one to two hours walking slowly around the main loop. It is a gentle visit with mostly flat or lightly sloped paths.

Rules to know before you go

Because it is a research forest, the rules are stricter than in a normal park. Picnics and eating meals are generally not allowed, nor are pets, bicycles, ball games or picking plants. Stay on the marked paths. Drinking water is fine. Toilets are available but limited, so plan ahead.

Make it a half day in eastern Seoul

Hongneung pairs well with nearby neighbourhoods. You can head to Gyeongdong Market and Yangnyeongsi, Seoul's big herbal medicine market, which is one or two subway stops away, for a late lunch and a look at ginseng and dried herbs. If you like early starts and views, the Achasan sunrise hike is another easy outdoor option on the east side of the city.

As Haneul from POPORO CITY puts it: "It's the one place in Seoul where you can hear your own footsteps on the leaves."

Quick tips

Check the official NIFoS site for the current opening days before you travel.
Come in the morning on spring and autumn weekends for quieter paths.
Pack water and a snack for later, but don't plan a picnic inside.
Wear comfortable shoes; some paths are unpaved and can be muddy after rain.
Bring mosquito repellent from June to September.
Search "홍릉숲" in Naver Map or KakaoMap for the most accurate directions.

FAQ

Is Hongneung Arboretum free?

Entry has been free for visitors. Guided docent programmes may need a reservation, so check the official site for current details.

Can I visit Hongneung Arboretum on a weekday?

Weekday visits have usually been for pre-booked guided tours and groups, while individuals come on weekends. Rules can change, so confirm on the National Institute of Forest Science website before you go.

How long should I spend there?

One to two hours is enough for a relaxed walk around the main paths, a bit longer if you like photography or want to read the tree labels.

Is it suitable for children or older visitors?

Yes. The paths are gentle and mostly shaded. Strollers can manage the main paved paths, but some side trails are unpaved.

When is the best time for autumn leaves?

Usually late October to mid-November. Seoul's peak colour shifts a little each year, so look at recent photos or local forecasts before your trip.