Ultra-endurance athlete Catherine Breed has completed an unprecedented 900-mile swim along the entire coastline of California. The 33-year-old swimmer finished her journey on Monday afternoon at Coronado beach in San Diego, 111 days after departing from the state's northern border on 1 July 2026. Breed, a former University of California, Berkeley swimmer, averaged approximately 10 miles per day throughout the expedition.
Supported by a shipboard team, Breed documented the endeavor for the World Open Water Swimming Association while using the platform to advocate for ocean conservation. Her journey was marked by significant environmental and physical challenges, including navigating through polluted waters near the US-Mexico border and contending with the effects of a Super El Niño weather pattern. Breed reported that the extreme weather resulted in constant adverse currents and waves reaching up to 7 feet, which she described as feeling like swimming in a washing machine.
Breed, who has previously completed notable open-water crossings including the English Channel and the North Channel, stated that the coastal swim was intended to test her endurance and encourage more women to engage with the ocean. Throughout the trip, she made various stops to participate in events with conservation groups and streamed portions of the swim online. The athlete noted that her motivation was rooted in a desire to shift the public focus from fear of marine life to the environmental impact humans have on the ocean.