Seoul Marathon

Seoul, South Korea · Tuesday 16 March 2027

Seoul Marathon, one of Asia's largest and most prestigious marathons, takes runners through the heart of South Korea's vibrant capital. The course passes many iconic landmarks, including the Gyeongbokgung Palace and the Han River. With its fast and flat profile, this event is ideal for achieving personal bests and qualifying for major international marathons.

Difficulty Calculator

Your Marathon Time

Adjusted Time

3:54:10

Moderate Difficulty

Time difference: -5.8 minutes compared to a flat, road, temperate course.

Course Details

Elevation Gain93m

Elevation High57m

Elevation Low16m

Weather Forecast

High6°C

Low-1°C

Chance of Rain90%

How hard is Seoul Marathon?

Moderateharder than 19% of marathons

Flattest / easiestHardest

On our difficulty model, Seoul Marathon plays about even with an average road marathon for a 3:30 runner. It ranks #932 hardest of 1150 marathons we analyse, and #3 of 3 in South Korea. Use the calculator above to see the exact adjusted time for your own goal pace.

What will you run at Seoul Marathon?

Estimated finish times on this course versus the same effort on an average road marathon, based on its elevation, surface, and expected race-day temperature.

Average-course time	On Seoul Marathon	Difference
3:00:00	2:56:10	−03:50
3:30:00	3:25:12	−04:48
4:00:00	3:54:10	−05:50
4:30:00	4:23:02	−06:58
5:00:00	4:51:51	−08:09
5:30:00	5:20:35	−09:25
6:00:00	5:49:16	−10:44

Use the calculator above for your exact goal time. Want a prediction from your own training? Try the marathon time predictor.

Seoul Marathon 2027 Course Analysis

Seoul Marathon is a full marathon held in Seoul, South Korea. It is scheduled for Tuesday 16 March 2027. The course is run on road surface with 93m of total climbing, with its high point near 57m above sea level. For registration and full race details, visit the official Seoul Marathon website.

Elevation Profile

This is a very flat course, with only 93m of total climbing and little change in altitude throughout. Flat profiles let you hold an even pace from start to finish, which makes this a fast, PB-friendly race.

Expected Race Day Weather

Based on historical weather data for March, the expected race day conditions are as follows. Cold conditions are expected, with temperatures between -1°C and 6°C. While cold weather reduces overheating risk, runners should dress in layers and be prepared for potential wind chill. There is a high chance of rain (90%). Runners should prepare for wet conditions, including appropriate footwear and clothing choices.

Surface Type: Road

Seoul Marathon is run on road surfaces, which provide the fastest and most predictable conditions for racing. Road courses allow for consistent pacing and are typically the best choice for a personal best.

Looking for an easier marathon or a tougher challenge? You can also compare Seoul Marathon against other marathons to find the right race for your goals.