Poet Gary Snyder was photographed for a story on ecology, and he is shown here in 1969 swimming in the Yuba river, and camping with his wife Masa and son Kai.

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Gary Snyder swimming and camping around the Yuba River in the Sierra Nevada, 1969

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Gary Snyder swimming and camping around the Yuba River in the Sierra Nevada, 1969

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Gary Snyder, with Masa and Kai, swimming and camping around the Yuba River in the Sierra Nevada, 1969

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Snyder004

Gary Snyder, with Masa and Kai, swimming and camping around the Yuba River in the Sierra Nevada, 1969

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Snyder005

Gary Snyder, with Masa and Kai, swimming and camping around the Yuba River in the Sierra Nevada, 1969

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Snyder006

Gary Snyder swimming and camping around the Yuba River in the Sierra Nevada, 1969

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Snyder007

Gary Snyder swimming and camping around the Yuba River in the Sierra Nevada, 1969

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Snyder009

Gary Snyder swimming and camping around the Yuba River in the Sierra Nevada, 1969

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Snyder008

Gary Snyder swimming and camping around the Yuba River in the Sierra Nevada, 1969

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Snyder010

Gary Snyder swimming and camping around the Yuba River in the Sierra Nevada, 1969

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Snyder011

Gary Snyder swimming and camping around the Yuba River in the Sierra Nevada, 1969

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Snyder012

Gary Snyder swimming and camping around the Yuba River in the Sierra Nevada, 1969

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Snyder013

Gary Snyder swimming and camping around the Yuba River in the Sierra Nevada, 1969

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Snyder014

Gary Snyder swimming and camping around the Yuba River in the Sierra Nevada, 1969

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Snyder015

Gary Snyder swimming and camping around the Yuba River in the Sierra Nevada, 1969

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Gary Snyder swimming and camping around the Yuba River in the Sierra Nevada, 1969

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Gary Snyder swimming and camping around the Yuba River in the Sierra Nevada, 1969