Seoul, South Korea · Sunday 16 March 2025
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.\n\nThe Seoul Marathon is a celebration of athleticism and community spirit, with participants enjoying the city's rich cultural heritage a
Adjusted Time
3:53:25
Time difference: -6.6 minutes compared to a flat, road, temperate course.
Seoul Marathon is a full marathon held in Seoul, South Korea, scheduled for Sunday 16 March 2025. The course is run on road surface with 93m of total elevation gain, reaching a maximum altitude of 57m above sea level. For registration and full race details, visit the official Seoul Marathon website.
This is a very flat course with only 93m of total elevation gain across the full distance. The course ranges from 16m to 57m above sea level — a 41m elevation range that makes it one of the flatter races available. Runners targeting a personal best will appreciate the minimal climbing.
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.
Seoul Marathon is run on road surfaces, which provide the fastest and most predictable conditions for marathon running. Road courses allow for consistent pacing and are typically the best choice for runners targeting a personal best time.
Our difficulty rating for Seoul Marathon is calculated using a model that combines elevation gain, temperature impact, and surface type. Use the difficulty calculator above to enter your target finish time and see exactly how many minutes this course would add or subtract compared to a perfectly flat, cool, road-based marathon. Faster runners and slower runners are affected differently by the same course conditions, so the difficulty is personalised to your pace.
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.