Out and Back course along the Keramoti sandbar coastline. Minimum age 18. Top 3 men and women in general and age group classifications (U29, 30–49, 50+) receive awards; minimum 5 athletes per age group required. Chip timing is mandatory — results will not count without the chip or if any timing mat is missed. 5 aid stations at km 3, 6, 10.5, 15, and 18, plus at finish. Shoes may be left at aid stations and collected at finish. Max 200 participants.