Gunsan Saemangeum International Marathon
Race Day Weather
Cool start — fast day potential, warming through the race
A cool 48°F at the start line is ideal for fast times — expect to warm up quickly once you're moving. Temperatures rising to 61°F through the course will gradually increase perceived effort in the second half. Light winds shouldn't be a major factor for pacing.
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Race Info
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.
