The transbay swim has grown to unmanageable proportions over the years, and will no longer be organized, according to the founders. David Briggs

For four decades, Nancy Hemmingway and Elizabeth Whitney have organized the annual Transbay Swim on the Sunday after Labor Day—at least as much as a word-of-mouth, unpublicized, unsponsored event on publicly-owned land can be considered organized. 

But this year, Ms. Whitney and Ms. Hemmingway say they are retiring the early-morning . . .

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