5, or the Cowlitz-Natches road: This road shall begin at a point in the center of the public highway running from the town of Napavine to Klickitat prairie in Lewis county, Washington, at the point nearest to the southeast corner of section 10, in township 12, north of range 1 east W. M., and shall run thence over the present surveyed line on such state road, by the way of Klicitat[sic] prairie and Riffe postoffice up the Cowlitz river and its tributaries, and over the summit of the Cascade mountains at the Carlton pass; thence over such surveyed line for said road down Bumping river and the Natches river to a point which bears south 73 degrees and 24 minutes east and is 2356 feet distant from the corner of sections 27, 28, 33 and 34, in township 15, north range 16, east W. M., in Yakima county, Washington."