Makguksu (buckwheat noodles in chilled broth) started in Gangwon-do and spread to other areas through the river. Its taste went viral through Seoulites who stopped by Cheonseo-ri (while traveling to and from Gangwon-do) and were fascinated by makguksu.

Soon, Cheonseo-ri makguksu became just as popular as the Gangwondo-style makguksu because the combination of the unique taste of dongchimi (chilled water radish) with piquant makguksu sauce captivated diners. A whole village became a makguksu-serving one, hosting the Makguksu Festival annually.