#17BARCELONA [Costa Brava]

The Mediterranean carves out the wild character of the Costa Brava at S’Agaró, home of the #17BARCELONA [Costa Brava] open water swimming weekend. The competition spans an entire two-day weekend, demanding a combined total distance of 16.65 kilometers in open water. Swimmers face two distinct daily stages that divide the mileage into structured endurance segments. Standing on the sand at daybreak, you prepare for the dual challenge of adapting to fluctuating open sea currents on consecutive mornings. Setting off from the beach, the physical rhythm of long-distance swimming takes hold as the pack spreads along the shoreline. Saturday opens the weekend with a 7-kilometer swim consisting of a complete loop around the bay of S’Agaró, with courses routed directly through rocky passages.

Swimmers must sight carefully through natural corridors between coastal boulders, feeling the swell lift and draw beneath each stroke. On Sunday, the program culminates in a 10-kilometer marathon swim stretching out into deeper coastal waters. Sighting distant marker buoys across prolonged open stretches demands consistent pacing and mental focus through the second day of racing. Tackling such marathon distances requires sustained conditioning, yet organizers do not impose any qualifying time standard for registration. To guarantee event safety across wide coastal expanses, participants must maintain a minimum continuous pace of two kilometers per hour throughout each leg. Swimmers are escorted by daily safety boats and a specialized support crew watching over the field across the waves.

Costa Brava waters: autumn temperatures and granite headlands

The course exposes swimmers to an ever-changing sea landscape, alternating between sheltered, calm bays and open, exposed coastal stretches. In the protected pockets of the bay, the water lies still, letting you find a relaxed rhythm. Once you round the headlands into open sea, the water reveals its fuller motion, testing your stroke mechanics against rolling swell and coastal drift. The coastline is defined by dramatic cliffs dropping vertically into the water and opening onto secret coves. Held in mid-October, the race takes place during an ideal window for late-season sea swimming. While autumn cools the mainland air, the sea retains its accumulated summer warmth, remaining remarkably comfortable for extended marathon swimming without a sharp chill.

Swimmers can focus entirely on navigation and rhythmic breathing without fighting the debilitating stiffness brought on by colder northern waters. Swimming close to sheer rock walls offers a view of the Catalan coastline that can only be appreciated from the water. Every stroke brings changes in light and texture as the morning sun angles off vertical stone and bounces across the water.

S’Agaró and the Camí de Ronda: Ferran Agulló’s wild coast

The dramatic topography of this coastline gave rise to one of the most recognized geographic names in Spain. In 1908, the journalist Ferran Agulló i Vidal coined the designation Costa Brava to capture the rugged and wild spirit of this Mediterranean littoral. In both Catalan and Spanish, the term 'costa' means coast, while 'brava' translates directly to rugged or wild. That name perfectly describes the broken perimeter and jagged passages that racers navigate stroke after stroke. At the center of this wild coastal geography sits the village of S’Agaró. Renowned for its sculpted coves and welcoming beaches, the settlement has grown alongside the natural contours of the coastline. Overlooking the water, a scenic coastal footpath winds its way along the headlands, framing the bays and rocky points that define the area.

After hours in the salty sea, the shoreline offers quiet promenades where you can unwind and take in the maritime atmosphere. The contrast between the rugged stone outcrops and gentle sandy shorelines gives the village its distinct coastal charm. Relaxing along the waterfront, athletes can watch the afternoon light settle on the Mediterranean waters they navigated earlier in the day.

S'Agaró in October: sea temperature and the Camí de Ronda

The organiser gives the typical sea temperature on the Costa Brava at the end of summer as 20 to 22°C (68-72 °F). On the first day of the #17BARCELONA weekend the 7 km is split into a 2 km and a 5 km swim, and the second day is a 10 km point-to-point swim. The S'Agaró Camí de Ronda connects the beaches of Sant Pol and Sa Conca and is part of the GR 92, the long-distance trail that runs across the entire Costa Brava. Panels along the S'Agaró Camí de Ronda give geological information about the formations to be seen on the coast. Along the S'Agaró Camí de Ronda stand the Loggia de Senya Blanca and the gazebo of the Plaça del Mirador, Italianate structures built with stone from Banyoles. The S'Agaró Camí de Ronda ends at the beach of Sa Conca.

The Catalan maritime frontier: from Barcelona’s harbour to the northern coves

Swimmers spending extra days in the region can enter the Challenge Barcelona Triathlon - Open Water Swim, held seven days later on the same trip. Facing the open Mediterranean at S’Agaró connects you with the living spirit of Catalonia's rugged coastline.