Santa Fe Grade Road of Merced County is an approximately thirty-mile mostly unsurfaced highway built on a repurposed railroad grade. Santa Fe Grade Road begins at California State Route 140 near Gustine and terminates to the southeast at the Fresno County line in South Dos Palos. The grade was constructed by the San Francisco & San Joaquin Railroad during the 1880s but was found to be consistently flood prone. The grade was later sold to the Atchison, Topeka and Santa Fe Railroad in 1898 which later abandoned it to Merced County.
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