...1st Korean International World Sand Sculpting Championship and Exhibition in Donghae 2009. The sand sculpting event, in Gangwon Province, will take place May 16 to June 28 with 30 artists from 15 nations.
The WSSA (World Sand Sculpting Association) says the event finishes on the 17th, while the Korea Times confirms the original dates and specifies the location as Mangsang Beach, just north of Donghae and near the whale museum I visited earlier.
As an aside, look at the spelling of Korea in the Google results for my search.
Thursday, May 14, 2009 | 9:17 p.m. ET ... A careful touch: A sculptor repairs a sand replica of Sungnyemun, which was burnt down last year, in preparation of the 1st Korean International World Sand Sculpting Championship and Exhibition in Donghae, Gangwon Province, Thursday. The event will be held through Saturday ..
This was the link for the Times.