Northwest toward 50 Mile Mountain from top of small plateau on trail between the middle fork and southwest fork of 73.6. Joins 500 GNCN 73.51.9 on the right
Papers of Otis R. Marston: Still images, 1870-1978. vols. 1-40, Colorado River and tributaries (Headwaters to Lee's Ferry) The Otis Marston Colorado River Collection
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