The first person to swim the length of the Columbia River (more than 1,200 miles) is a passionate guy. And not just about his sport, but about rivers and oceans too, and about teaching people why it's important to keep them clean. In April, Swain, who has also swum the Hudson and Charles Rivers (315 and 80 miles, respectively), will attempt to swim more than 1,000 miles from Marblehead, Massachusetts, to Washington, D.C.
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