In 1844, while exploring and mapping the area of what is presently the western United States, Lt. John C. Frémont's party passed through northern Mono County during the last week of January. After passing through Mono County, Frémont passed over the Sierra and travelled to Sutter's Fort in the Sacramento Valley, where the party rested. To leave California the expedition headed south through the San Joaquin Valley, and then headed easterly to leave California by the Old Spanish Trail to Utah.

Citation from California Office of Historic Preservation