I recommend everyone to read this story, its excellent and only 10 pages long. Here's a brief synopsis I found on the web:
"The Swimmer" is a masterpiece of mystery, language and sorrow. It starts out, on a perfect summer morning, as the record of a splendid exploit - Neddy Merrill's quest to swim the eight miles from the house of his friends, the Westerhazys, to his own, via the swimming pools of fashionable Shady Hill - and ends up as a kind of ghost story, with night and autumn coming on, in a thunderstorm, at the door to a haunted house.

Cheever's mastery lies in the handling of Neddy's gradual, devastating progress from boundless optimism to bottomless despair, from summer to fall, from swimming pool to swimming pool, no two alike, each described with Cheever's lyrical precision. This progress Cheever figures through a careful manipulation of the marks of seasonal change -the leaves on trees, the wheeling of the constellations- so that as we read the story we feel time passing, before our eyes; feel Neddy losing heart, growing weary, getting old. The story has mythic echoes -the passage of a divine swimmer across the calendar toward his doom- and yet is always only the story of one bewildered man, approaching the end of his life, journeying homeward, in a pair of bathing trunks, across the countryside where he lost everything that ever meant something to him.

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