Achasan Sunrise Hike in Seoul: Easiest Route and How Early to Go

Short answer: The easiest way to see sunrise from Achasan in eastern Seoul is to take Seoul Subway Line 5 to Achasan Station, walk toward Achasan Ecological Park, and follow the signs uphill to Haemaji Gwangjang (Sunrise Square) and the ridge above it. Most people reach the first good viewpoint in about 20–40 minutes at a relaxed pace. Plan to start walking roughly an hour before sunrise, so you have time to find the trail in the dark, climb without rushing and pick a spot before the sky starts to glow.

Achasan is a low mountain on the east side of the city, between Gwangjin-gu and Guri. It is not a serious climb, which is exactly why it is so popular: you get a wide view over the Han River, the Lotte World Tower and the eastern hills without needing hiking experience. This guide explains the simplest route, how early to leave, what to bring and how to combine the hike with a hot breakfast afterwards.

Why Achasan is a good sunrise hike for first-time visitors

Seoul is ringed by mountains, but many of them, like Bukhansan, need a few hours and some scrambling. Achasan is different:

It is close to the subway. The trailhead is a short walk from a Line 5 station, so you do not need a taxi before dawn if trains are already running.
It faces east. The ridge looks out over the Han River and toward the hills of Guri and Hanam, which is where the sun comes up.
The path is clear and well used. The lower section is stairs and paved or packed paths, and there are usually other walkers, even early in the morning.
It is short. You can be up, watch the sunrise and be back down for breakfast before most cafés open.

Haemaji Gwangjang is one of the best-known places in Seoul to watch the first sunrise of the year, so on New Year's morning it gets very crowded. On a normal day it is calm, and you may share the view with only a handful of local walkers.

The easiest route: Achasan Station to Haemaji Gwangjang

Step 1: Get to Achasan Station (Line 5)

Take Line 5 (the purple line) to Achasan Station. The station's full name also mentions the back gate of Seoul Children's Grand Park, so you may see that on signs. Guides differ on whether exit 1 or exit 2 is better, and both are used, so check the current map in Naver Map or KakaoMap before you leave. Search for "아차산 생태공원" (Achasan Ecological Park) and walk there; it is the usual starting point.

Step 2: Walk through Achasan Ecological Park

From the station it is a short walk through a residential street to the park entrance. The ecological park is a small area of gardens and wooden decks at the foot of the mountain, and it has public toilets, which are worth using before you go up. From here, follow the signs uphill. Korean trail signs usually show both Korean and English, and you are looking for 해맞이광장 (Haemaji Gwangjang).

Step 3: Climb to Haemaji Gwangjang

The path climbs steadily with long sections of wooden or stone stairs. For most reasonably fit visitors, this part takes 20–30 minutes. Haemaji Gwangjang is an open area with a view to the east, so it works well as your sunrise spot if you are short on time or energy.

Step 4 (optional): Continue to the ridge and the fortress sites

If you have more time, keep going up the ridge. Achasan has remains of old Goguryeo-era fortifications (watch posts called boru), and the ridge path gives you a wider panorama over the river. You can continue along the ridge toward Yongmasan if you want a longer morning walk, but for a sunrise hike most people stop on the first ridge section and come back the same way.

Coming down

The simplest option is to return the way you came. The stairs can feel steeper on the way down, especially if they are damp with morning dew, so take them slowly. Another option is to walk down toward Gwangnaru Station (also Line 5), which also has an Achasan trailhead. Check the signs and your map app before you choose a different path down.

How early should you go?

Sunrise time in Seoul changes a lot through the year. In early summer the sun can rise before 5:30 a.m., while in mid-winter it rises closer to 7:45 a.m. Always check the exact time for your date: search "Seoul sunrise" or look at the weather app on your phone the night before.

A simple rule:

Be at the trailhead about 60 minutes before sunrise. This gives you 20–40 minutes of walking plus time to rest and find a spot.
Arrive at the viewpoint 15–20 minutes before sunrise. The sky often turns orange and pink well before the sun actually appears, and many people think this is the best part.
Check the first train time. In winter, the first Line 5 train is early enough for most sunrise times. In summer, sunrise can come so early that the first train may not get you there in time. Check the first train in your map app, and consider a taxi if needed.

Autumn and winter are often the easiest seasons for this hike, because sunrise is later and the air is usually clearer. Summer mornings can be hazy, and on humid days the view may be soft rather than sharp.

What to bring

A headlamp or phone flashlight. Parts of the trail are not lit, and it is completely dark before sunrise.
Shoes with grip. Sneakers are fine for the stairs, but there are rocky and dusty sections higher up.
Warm layers. Even in spring and autumn, it is cold at the top before dawn, especially when you stop walking. In winter, bring gloves, a hat and a proper warm jacket.
Water and a small snack. Convenience stores near the station are open early, so you can grab a drink and a triangle kimbap on the way.
A T-money card or phone payment for the subway.

You will probably see Korean hikers in full outdoor gear even on this small mountain. You do not need any of it, but if you are curious why, we explain it in Why do Koreans hike in full outdoor gear?

Safety and etiquette

Stay on marked paths. Side paths can look like shortcuts in the dark but may be steep or lead somewhere else.
Walk with a friend if you can, or tell someone your plan if you go alone.
Keep your voice down at the viewpoint. Many locals come here for a quiet morning routine.
Take all rubbish with you. There are very few bins on Korean mountains.
Do not use drones without checking the rules. Seoul has many restricted airspace zones.
If the weather is icy or there is heavy rain, skip the hike. The stairs become slippery quickly.

After the hike: breakfast nearby

When you come back down, the streets around Achasan Station and Gwangnaru Station have small Korean restaurants, bakeries and 24-hour convenience stores. A bowl of hot soup like haejangguk or seolleongtang is a classic Korean way to warm up after an early start. Opening hours vary, so look at your map app for places marked as open early. If you prefer to keep exploring, Seoul Children's Grand Park is close by and makes an easy, relaxed next stop.

Is Achasan right for you?

If you want a sunrise view in Seoul without a long or difficult climb, Achasan is one of the best choices. If you are a more experienced hiker and want a bigger mountain day, look at our guide to Bukhansan hiking for beginners instead.

Quick tips

Start at Achasan Station (Line 5) and head for Achasan Ecological Park.
Be at the trailhead about one hour before sunrise.
Bring a light, warm layers and shoes with grip.
Haemaji Gwangjang is enough for a great view; the ridge is a bonus.
Avoid New Year's morning unless you enjoy big crowds.
Check sunrise time and first train time the night before.

FAQ

How long does the Achasan sunrise hike take?

Most people reach Haemaji Gwangjang in 20–40 minutes from the station area. A round trip with time to watch the sunrise usually fits into about two hours.

Is Achasan hard for beginners?

No. It is one of the easiest mountains in Seoul. There are many stairs, so it is a workout, but there is no climbing or scrambling on the main route.

Can I hike Achasan in winter?

Yes, and winter sunrises are later, which makes the timing easier. After snow or freezing rain, the stairs can be icy, so wear shoes with good grip or wait for better weather.

Is it safe to hike Achasan alone in the dark?

The main route is busy and well marked, and many locals walk it early. Still, use a light, stay on the main path and let someone know your plan.

Where can I check sunrise times?

Your phone's weather app or a quick search for "Seoul sunrise" will show the time for your date. Check the night before and plan to arrive 15–20 minutes early.