SeaGreece

1st sport festival Ko

Sep 26, 2026
Distances from 100m to 3km

About the race

Late September in the Aegean brings a specific settling of the winds, yet the channel between Kos and the neighboring islands remains influenced by deep-water movements. Swimmers should anticipate water temperatures hovering near 24°C, providing a stable, temperate environment for the race. Beneath the surface, the seabed drops abruptly into an underwater chasm that reaches depths of 70 meters, a geological scar left by historical volcanic activity. This dramatic shelf creates a distinct shift in water clarity and buoyancy that you will notice as you transition from the shallower harbor zones into the open sea. Maintaining a steady stroke becomes essential here, as the lack of immediate visual references in the deeper sections can disrupt your internal pace.

Αρχαία Αγορά Κω
Αρχαία Αγορά Κω · Photo: Karelj · Public domain

Historical maritime landmarks

Navigating the coastline offers a rare perspective on centuries of strategic conflict. The route passes directly alongside the Castle of Nerantzia, a 14th-century fortification constructed by the Knights Hospitaller. Look closely at the masonry while you breathe: the walls incorporate white marble elements stripped from the ancient city and the Asklepieion. This architectural recycling connects the current swim path to the ancient market that thrived here in the 4th century BC. Further along the trajectory, the water deepens near the sites where naval fleets once clashed. Historians trace the 261 BC Battle of Cos to these very coordinates, a turning point that some scholars link to the inspiration behind the Nike of Samothrace.

Logistics for the 1st Sport Festival Ko reflect the complexity of swimming in a historically active port. The course layout accounts for the proximity to the harbor entrance, where in 1773, a Russian landing party attempted to storm the local fortress during the Orlov revolt. Today, the challenge lies in managing your energy as you parallel the rugged coastline toward Cape Drekanon. Organizers coordinate the event to ensure safety within these maritime lanes, balancing the needs of the swimmers with the maritime traffic typical of this Dodecanese hub. Because the event is part of a broader festival organized by the local cycling and running associations, you can expect a high level of land-based support during the transit. The experience is defined by the contrast between the calm, clear shallows near the ancient ruins and the deep, dark blue of the open Aegean channel.

Κάστρο της Νεραντζιάς Κω
Κάστρο της Νεραντζιάς Κω · Photo: Arne Müseler · CC BY-SA 3.0 de

Sources: Kos · Αρχαία Αγορά Κω · Κάστρο της Νεραντζιάς Κω · Battle of Cos

Course

How to get there

✈️ Search flights to KGS

1st sport festival Ko

Where to stay

The town offers a range of options, from traditional guest houses in the old town to boutique hotels overlooking the harbor. For those seeking proximity to the start, apartments within walking distance of the fortress are common. Prices typically range from €80 to €250 per night, depending on the proximity to the waterfront and the level of service.

Things to do nearby

The island features significant archaeological sites, including the extensive ruins of the ancient agora. You can explore the coastline further by renting a kayak to reach the more secluded coves near the western cliffs. Local producers offer tastings of traditional Aegean honey and wine, while the inland mountain villages provide quiet trails for post-race recovery walks.

Swimmers

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