Bamseom Island Eco Marathon

About the Event

The 4th Bamseom Marathon takes place on Sunday, 31 May 2026 at 8:00 AM at Yeouido Park Culture Plaza in Seoul, South Korea. This environmental marathon raises awareness of the importance of Bamseom Island in the Han River and the Ramsar wetlands. The event offers three distances: half marathon, 10 km, and 5 km. The start and finish are at Yeouido Park Culture Plaza, with courses running along Yeouido Hangang Park, the Han River, Seongsan Bridge, and surrounding green spaces. The race uses timing chips for all participants, and souvenirs include a commemorative t‑shirt, finisher medal, certificate of completion, bread, and drinks.

Distance	Course Route
Half Marathon (21.1 km)	Yeouido Park Culture Plaza → Mulbit Stage Plaza → Yeouido Hangang Park → Yeouido Recreation Forest → Yeouiharyu IC Intersection → Seongsan Bridge → turnaround near Banghwa Bridge → return to start
10 km	Yeouido Park Culture Plaza → Mulbit Stage Plaza → Yeouido Hangang Park → Yeouido Recreation Forest → Yeouiharyu IC Intersection → turnaround near Seongsan Bridge → return to start
5 km	Yeouido Park Culture Plaza → Mulbit Stage Plaza → Yeouido Hangang Park → Yeouido Recreation Forest → before Yeouiharyu IC Intersection → return to start

Eligibility: Anyone, regardless of age or gender, who is physically healthy. Children can participate on the 5 km course.

Application period: Until 19 April 2026 (or earlier if capacity is reached). Participation fee is 50,000 KRW for any distance. Payment account: Woori Bank 1005‑004‑624708 (Korea Sports for All Federation).

Awards and souvenirs: Souvenirs and prizes are subject to change. Finisher medal and commemorative t‑shirt are included. Mobile/web certificates of completion are provided for chip‑timed events.

Organizer: Korea Sports for All Federation. Sponsors include Jeongseong Foods, Greenvia, and Haps. Venue address: 68, Yeouigongwon‑ro, Yeongdeungpo‑gu, Seoul (Yeouido‑dong). For inquiries: ☎ 02‑569‑5551 or [email protected].

The marathon course is subject to change. Please check the official website bamseom.com for the latest updates. Join us at Bamseom, where nature and the city meet, and run for a healthy tomorrow.

Races Offered

10km

May 31, 2026

straighten

Distance — 10K

terrain

Type — Running

timer

08:00

sell

$33.85

5km

May 31, 2026

straighten

Distance — 5K

terrain

Type — Running

timer

08:00

sell

$33.85

Half Marathon

May 31, 2026

straighten

Distance — 21.1K

terrain

Type — Running

timer

08:00

sell

$33.85

Weather History

These values represent the 3-year monthly averages for May in Seoul.

thermostat Temperature

12.0° / 22.2°

wb_sunny Feels like

10.5° / 20.3°

light_mode Avg sunshine hours

9h 3m

water_drop Avg rainfall

4.3 mm

ac_unit Avg snowfall

—

air Avg wind speed

9.0 km/h (Light breeze)

opacity Sweat loss rate

Moderate

terrain Course conditions

Firm and slightly soft

sunny Max UV Index

High (6.0)

humidity_mid Humidity

71.2%

wb_twilight Sunrise

05:22

nightlight Sunset

19:34

About Seoul

Learn more about the host city, Seoul.

Seoul (서울) is the capital of South Korea. With a population of over 9 million, Seoul is by far South Korea's largest city and one of East Asia's financial and cultural centers. A fascinating blend of ancient traditions and cutting-edge digital technology, home to endless street food vendors and vast nightlife districts, an extraordinarily high-pressure educational system and serene Buddhist temples, a dynamic trend-setting youth culture and often crushing conformism, extraordinary architecture and endless monotonous rows of grey apartment buildings, Seoul is a city filled with stark contrasts, contradictions, and paradoxes. People in Seoul can enjoy various artistic activities such as plays, musicals, and concerts.