Tamalpais in Marin County -- just on the other side of the Golden Gate Bridge -- a seemingly adult way to pass the time.

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Tamalpais and the Southern Marin Ridgeline.

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The trail begins with a wicked climb up 650 steps carved into a hillside and ends a brutal (and lovely) seven miles later (and after a 2, 200-foot climb and descent) on the other side of Mount Tamalpais, at the tiny town of Stinson Beach on the coast of the Pacific Ocean.

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