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Postcard view looking south from Mount Tamalpais' peak. The train track below parallelled itself five times within 300 feet while climbing ninety five vertical feet. This part of the Mill Valley and Muir Woods Railroad line became known as the Double Bow Knot. The Mt. Tamalpais and Muir Woods Railroad ran from 1896 until 1929, from downtown Mill Valley, California to near the summit of Mt. Tamalpais, with a second line descending the West side of Mt. Tamalpais to Muir Woods beginning in 1907.