Motorist driving Oakland Six automobile on Sonora Pass Road, California

View of motorist driving an Oakland Six car on snow-covered Sonora Pass Road in California. Label on back: "Oakland Six smahses Six Peaks record. On the Sonora Pass Road (alt. 9624 feet) the record breaking Oakland Six plowed its way through snow 6" deep. On this trip the Oakland Six combined six record breaking performances into one outstanding endurance, reliability and time performance, traveling 730 miles in 30 hours and 42 minutes with a perfect record. On this trip the hood and radiator were sealed and the six highest summits of the Sierra Nevadas were crossed, and the car climbed a total of 30,990 feet. it was one of the most exacting tests ever demanded of a motor car, and emphasizes the safety driving features of the Oakland Six four-wheel brakes and sturdy construction. Oakland Motor Car Co." Handwritten on back: "Oakland, 1925-26."