Gunsan Saemangeum International Marathon
Gunsan, South Korea · April · Independent
Why people love it
- World Athletics certified course from 2025; the 2024 race was an Olympic selection race.
- Cherry blossom roads in Gunsan in early April.
- A 2025 runner praised the aid stations and flat course and ran a personal best.
- Cool start of about 5 °C (41 °F) and a fee of about 43 USD.
Watch out for
- The 1,800-runner marathon cap filled within an hour in 2026; registration is Korean-language.
- Older route descriptions are outdated because the course changed in 2025.
- Sea-wall sections may be exposed to wind and one comment called them monotonous.
- Few reviews exist, mostly Korean forum posts and news.
Race
How racers feel about it, how well it is run, and how it treats a first timer. Counts for 28% of the overall score.
Toughness: Tough
- Racer satisfactionLoved3.7
Two Korean forum runners: one praised the aid and flat course and ran a personal best, one missed a goal through pacing. Little else. · Low confidence
- OrganizationWell run3.9
City and federation run it with ambulances, medical booths and a situation room, and a 2025 runner praised the aid stations. · Low confidence
- First timer friendlyFriendly3.7
Flat per a 2025 runner, strong medical cover and a capped field. Cutoff not found, and entry fills fast. · Low confidence
Course traits, not part of the score
- PR potentialFast4.0
A 2025 runner ran a personal best on a flat course. Course was re-certified in 2025 and the 2024 race was an Olympic selection race. · Low confidence
Course
Scenery, road surface, closures, and room to run. Counts for 20% of the overall score.
- Course sceneryBeautiful3.5
Cherry blossom roads in Gunsan are highlighted in 2024 coverage; a relayed comment called the sea-wall stretch of an older route monotonous. · Low confidence
- Room to runRoomy3.6
Full marathon capped at 1,800 runners, with 10 km (6.2 mi) and 5 km (3.1 mi) runners on the same day. No congestion complaints found. · Low confidence
- Road surfaceGood3.8
No surface complaints found on a certified road course. · Low confidence
- Road closuresMostly closed3.5
The 2025 route was designed to limit disruption to residents. Full closure is not confirmed. · Low confidence
Course traits, not part of the score
- Course flatnessMostly flat4.1
A 2025 runner described it as flat. Gain is not published. · Low confidence
- Net downhillEven3.0
Loop from Wolmyeong Stadium with no published net drop. World Athletics certified. · Low confidence
Support
Crowds, aid stations, the start, and pacers. Counts for 20% of the overall score.
- Start logisticsSmooth3.6
07:30 start at the stadium in a mid-sized city. Details are thin. · Low confidence
- Pacers and timingGood3.5
Runners target specific times and official record certificates are issued. Pacer details not found. · Low confidence
- Crowd supportDecent3.2
2024 coverage says residents cheered along the course. Rural sections are quiet. · Low confidence
- Aid stationsGood4.0
A 2025 runner praised the aid stations, and ambulances and medical booths are on the course. · Low confidence
Conditions
Air temperature, how predictable the weather is, setting, and spectating. Counts for 14% of the overall score.
- WindSome wind3.2
Coastal and sea-wall sections can be windy, but no runner reports it. · Low confidence
- Air temperaturePleasant4.1
A 2025 runner reported about 5 °C (41 °F) and chilly before the start. April highs near 16 °C (61 °F) are typical. · Low confidence
- Weather reliabilityVariable3.4
April weather on the Yellow Sea coast. Only two years of reports. · Low confidence
- Spectator friendlySome viewpoints3.2
Stadium start and finish area with city sections. Little detail. · Low confidence
Course traits, not part of the score
- Low altitudeSea level4.9
Coastal city about 10 m (33 ft) above sea level. · High confidence
Stay and travel
Hotels, walkability, getting there, and the town around the race. Counts for 10% of the overall score.
- Hotel availabilityBook early3.3
Mid-sized city during cherry blossom season. No race data. · Low confidence
- Hotel valueNormal3.4
Korean regional city pricing. No race data. · Low confidence
- WalkabilitySome driving3.0
Start at Wolmyeong Stadium in the city. Distance from hotels is unknown. · Low confidence
- Travel easeOne connection3.0
Gunsan is about 190 km (118 mi) from Incheon, so train or bus travel is needed. · Low confidence
- LogisticsSome complexity3.4
Registration is Korean-language, and record certificates are looked up on the Oh My Race site. · Low confidence
- Town and foodFine3.4
Coastal city with local seafood and cherry blossoms. Little race-specific detail. · Low confidence
Entry
How hard it is to get a place, and what you get for the fee. Counts for 8% of the overall score.
- Getting inHard1.8
The 2026 full marathon cap of 1,800 filled within an hour of opening, and registration is Korean-language only. · Medium confidence
- Value for moneyGood value3.9
60,000 KRW (about 43 USD) in 2026 for a certified marathon with medical and aid support. · Low confidence
Key facts
- Location
- Gunsan, North Jeolla, South Korea
- Typical month
- April
- Latest or next date
- 5 April 2026
- Organiser
- Independent
- Field size
- About 1,800 athletes
- Distances
- 42.2 km (26.2 mi)
- Course type
- loop
- Start time
- 07:30
- Boston qualifier
- Yes
- Surface
- Roads, including coastal and seawall sections on older routes
- How to get in
- open
- Sells out
- Yes
- Entry fee
- About $43
- Air temperature
- 5–16 °C (41–61 °F)
- Humidity
- Coastal and moderate in April
- Altitude
- 10 m (33 ft)
- Nearest airport
- Gunsan (KUV), limited service; Incheon (ICN) for most visitors
- Where to stay
- Gunsan city centre near Wolmyeong Stadium
- Booking
- Book early in cherry blossom season.
What racers and reviewers say
- Damoang running forum (2025 marathon report, Korean)Raced 2025 · forum · Positive
A runner aiming to finish under 4 hours says the day was cold at about 5 °C (41 °F), they started deliberately slowly, and the aid stations and flat course helped them run a personal best.
- Damoang running forum (2026 marathon report, Korean)Raced 2026 · forum · Mixed
A 2026 marathoner cramped late in the race and missed a 3:05 target. The report is about their own pacing and fitness rather than the course.
- Damoang running forum (older threads, Korean)forum · Mixed
Older threads discuss the race. One commenter, passing on a friend's view, found the sea-wall stretch monotonous and boring. The course was changed in 2025.
- Jeonbuk Ilbo (2024 race coverage, Korean)Raced 2024 · article · Positive
The 10th edition drew about 8,000 runners and doubled as an Olympic selection race. Runners passed Gunsan's cherry blossom roads, ambulances and medical booths were stationed along the course and residents cheered.
- Jeonbuk Ilbo (2025 race preview, Korean)Raced 2025 · article · neutral
The 2025 race on 6 April used a course remeasured by the Korea Athletics Federation and certified by World Athletics, with a full marathon fee of 55,000 KRW (about 39 USD).
Raced Gunsan Saemangeum International Marathon? Your notes on the course, conditions and logistics help the next athlete decide.
Sources
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