SAN FRANCISCO (KRON) -- Open-water swimmer Catherine Breed swam from the Farallon Islands to San Francisco's Golden Gate Bridge, a chilly 30-mile journey through some of the Pacific Ocean’s most notorious great white shark territory.

Breed said she completed her 30.6-mile swim Tuesday in 13 hours, 54 minutes.

The Pleasanton native was assisted by an expert boat crew that followed Marathon Swimmers Federation rules: swimmers may not use a wetsuit and they can't touch the boat.

Breed, 32, said in an Instagram video, "My body was OK, but my mind was not in a great spot. It’s like the islands and the ocean gave me a perfect day but infiltrated my head with doubt. Of all the swims I have done, this one was the mentally hardest."

"Doubt is a really powerful negative emotion," the swimmer sai

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