(1) Date & Time: June 5, 2026 (Fri), 14:00 – 15:00 (2) Venue: Han River, Jamsil Underwater Weir (South End – North End) (3) Categories: Men (Fins) / Men (Barefoot) / Women (Fins) / Women (Barefoot) (4) Eligibility: Foreign nationals other than Korean citizens (Age limit must be verified) (5) Number of Participants: 450 (No limit per category, total 450 participants) (6) Equipment: Full wetsuit (mandatory), life vests may be brought individually (7) Awards: Seoul City Standard Plaques awarded to the top 5 winners in each category