While looking for a way around the closure in California State Route 49 north of Bear Valley I stumbled about a couple historic markers for the Agua Fria ghost town on CA 140. Agua Fria was located just north of modern CA 140 along Agua Fria Road in Mariposa County. Agua Fria is significant in that it was the first County Seat of Mariposa County between 1850 to 1851 before it was moved to Mariposa. Agua Fria apparently had two sections called "Upper" and "Lower" Agua Fria which were centered around two springs. Apparently the gold claims in Agua Fria quickly exhausted and frequent fires in the 1850s did the town in. Agua Fria apparently had Post Office Service until 1862.