Powered by The North Face. Start and finish at the Desalination Plant in Oia; route passes through the settlements of Imerovigli and Firostefani with continuous terrain changes, volcanic rock, traditional cobblestone paths and panoramic views of the caldera and the Aegean. Residents of the Municipality of Thira may participate free of charge; registration details to be announced by the organizers. Full cancellation refund available if requested by 20 August 2026. Also part of the 3-day Santorini Experience 2026 (16–18 October): open water swimming of 2.4km takes place on Saturday 17 October (09:30), starting from the Volcano and finishing at the Old Port of Fira. Contact: pr@activemedia.gr, Tel. +30 210 9312881.