UltraSwim 33.3 #7Croatia, 16-19 May 2025 | World's Marathons

ultra33The Specification. Ultra ATA66 (you'll also hear it referred to as Ultra DMA66 or Fast ATA-2) allows for a theoretical maximum burst transfer rate of 66.6MBs, doubleDiscover the UltraSwim 33.3 #7Croatia in Croatia. 24 hour cancellation policy Discounts Over 4000 other races. Learn more