South Korea Marathon Guide 2026

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South Korea offers a vibrant calendar of running events throughout the year, ranging from scenic coastal marathons in Busan to themed city runs and challenging trail courses across the country. Whether you are aiming to complete your first full marathon or simply looking to join a lively fun run while travelling, planning your race schedule alongside effective training is key to a rewarding experience.

Running in varying weather conditions requires a structured approach. Incorporating Long Slow Distance (LSD) training into your weekly routine serves as a foundational element for building endurance, maintaining a suitable pace, and completing full marathon distances safely. Furthermore, adjusting your training strategy during hot summer months by selecting optimal times of day, managing hydration, and practicing heat acclimatisation ensures year-round progress.

Featured Upcoming Races in South Korea

Among the top upcoming events across the country, several notable themed and regional races draw strong interest from international and local participants alike.

【Attraction Tickets】2026.11.7 Busan Fireworks Festival [Gwangalli Fireworks Viewing Zone]

Available 2026-11-07

HKD 401 Start

Book now

2026 Marvel Run

* Date: Saturday, 31 October 2026

* Location: Inje Speedium, Gangwon-do

* Distances: 5km, 10km, Half Marathon, Full Marathon

* Status: Registration Upcoming

Harry Potter Run

* Date: Saturday, 3 October 2026

* Location: Near Busan Station, Busan

* Distances: 5km

* Status: Closed

2026 Infinite Challenge RUN in Gyeongju

* Date: Saturday, 19 September 2026

* Location: Gyeongju Civic Stadium, Gyeongbuk

* Distances: 10km, Half Marathon

* Status: Closed

Additional Regional Races and Trail Events

A diverse range of trail runs, coastal challenges, and night runs take place across various provinces on Saturday, 12 September 2026:

* Bbang Trail Run 2026: Held at High1 Resort and Haneul-gil in Gangwon-do, offering 12km, 20km, and 30km trail distances.

* 2026 Yeosu Baekriseomseom Trail Run: Located at Cheongshim International Marine Youth Center (183-5 Jangsu-ro, Hwayang-myeon, Yeosu-si, Jeollanam-do), featuring 16.4km, 27.6km, and 40km courses.

* Seoul Olympics Memorial 88RUN: Set around Misa Regatta Park in Hanam, Gyeonggi-do, featuring 5km and 10km categories.

* 2026 Egg Marathon: Hosted at Jeongseojin Gyeongin Ara Waterway Passenger Terminal Plaza in Incheon, providing 5km, 10km, and Half Marathon routes.

* Before Sunrise Slow Marathon (Gangneung): Taking place around Gyeongpo Lake Park and Gyeongpo Beach in Gangwon-do, with 5km and 10km options.

* 2026 Cheongju Night Run Festival: Situated at Musimcheon Sports Park in Cheongju, Chungbuk, offering 5km and 10km courses.

* 2026 Energy Hero Race: Held at World Cup Park Peace Square in Seoul, featuring 5km and 10km distances.

* Good Neighbors Race with Think Earth - Seoul Race: Located in front of the Yeouido Hangang Park Mulbit Stage Plaza in Seoul, featuring 5km and 10km categories.

Practical Tips

* Verify Official Event Info: Details such as dates, venues, entry fees, and registration windows are based on organizer submissions and are subject to change. Always check the official event websites directly before travelling.

* Early Registration: Popular themed races and city marathons often reach capacity early on a first-come, first-served basis.

* LSD & Summer Safety: When training in extreme summer heat above 30 degrees, adjust your running hours to early morning or late evening, prioritize steady hydration, and build mileage gradually.

* Travel Logistics: Plan regional transport early when attending events outside major hubs like Seoul or Busan, as local transport options can fill up rapidly on race days.