The 2026 Gunsan Saemangeum International Marathon has concluded.

Gunsan Saemangeum International Marathon

Race complete
Gunsan, South Korea · April 5, 2026
partly-cloudy-day48°·50° high·Light·Dry
10
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Gunsan Saemangeum International Marathon race day weather

partly-cloudy-day
48°at start
50° high
Light
Dry
Goal
0:00:00

Cool start, steady finish

Runners will face temperatures starting at 48°F and rising to 60°F, with average humidity at 62%. Light winds from the SE will be a non-factor for pacing. A conservative start is advisable, especially as the temperature climbs, allowing runners to adjust to the warming conditions.

partly-cloudy-night10
partly-cloudy-night10
partly-cloudy-day10
partly-cloudy-day10
Start
partly-cloudy-day10
partly-cloudy-day10
partly-cloudy-day10
Finish
partly-cloudy-day8
partly-cloudy-day10
Cutoff
partly-cloudy-day8
clear-day9

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About the Gunsan Saemangeum International Marathon

The Gunsan Saemangeum International Marathon is a World Athletics Label race held each spring in Gunsan, South Korea, one of only three Korean marathons carrying that label alongside the Seoul Marathon and Daegu Marathon. The course starts and finishes at Gunsan's Wolmyeong Sports Complex, passing the Geumgang River estuary dam and Gunsan City Hall on a flat, fast route timed for cherry blossom season. Isaac Kipkemboi Too of Kenya set the men's course record of 2:07:15 at the 2026 edition. The race is a Boston Marathon qualifier.

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Race weekend

Sunday, April 5
7:30 AM10K (6.2 mi)
7:30 AM5K (3.1 mi)
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Gunsan Saemangeum International Marathon FAQ

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When is the 2026 Gunsan Saemangeum International Marathon?

The 2026 Gunsan Saemangeum International Marathon will be held on Sunday April 5, 2026.

Is the Gunsan Saemangeum International Marathon a Boston Marathon Qualifier?

Yes, the Gunsan Saemangeum International Marathon is an official Boston Marathon qualifier.

What is the time limit for the Gunsan Saemangeum International Marathon?

The time limit for the Gunsan Saemangeum International Marathon is 5 hours.

What will the weather be like for the 2026 Gunsan Saemangeum International Marathon?

The forecast calls for a high of 61°F and a low of 43°F with a 0% chance of rain. Check our detailed hourly forecast above for the best marathon race plan.

What is the weather usually like for the Gunsan Saemangeum International Marathon?

Over the 4 years racecast.io has race-day weather for (2023 to 2026), it averaged 44°F at the start and 59°F by a typical finish. It has not rained during race hours in any of those years.

What was the hottest Gunsan Saemangeum International Marathon?

Of the 4 years on record, 2024 was the warmest, reaching 76°F during race hours. The coldest start was 2023, at 37°F.

What was the windiest Gunsan Saemangeum International Marathon?

Of the 4 years on record, 2025 was the windiest, with wind averaging 5 mph during race hours. The calmest was 2026, at 2 mph.

Gunsan Saemangeum International Marathon weather history

Based on 4 years of data
Avg Temp
52°F
L:44° H:59°
RunScore
9
Conditions
Rain Freq
0%
0 of 4 yrs
Wind4mph
Dew41°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults

2026 Gunsan Saemangeum International Marathon

Partly cloudy throughout the day.

2026
partly-cloudy-day
46°/50°-
10

2025 Gunsan Saemangeum International Marathon

Clear conditions throughout the day.

2025
clear-day
40°/54°-
10

2024 Gunsan Saemangeum International Marathon

Partly cloudy throughout the day.

2024
clear-day
51°/76°-
6

2023 Gunsan Saemangeum International Marathon

Clear conditions throughout the day.

2023
clear-day
37°/57°-
10

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