The Dutch Flat & Donner Lake Wagon Road approached Donner Pass from Truckee up this steep gradient. The road crossed the railroad between tunnels nos. 6 and 7 near the top, adjacent to the building visible in this view. An underpass was built for this crossing in 1914. By locating the underpass east of tunnel no. 7, the road’s path was made longer, reducing the gradient. The underpass allowed automobiles to pass safely under the railroad without regard to railroad traffic. The old underpass still exists, but the road through it was abandoned in 1926 with the opening of the Donner Summit Bridge and a new highway route that crosses the pass entirely north of the railroad. The photographer's mobile darkroom wagon appears at the lower left.
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