Asco, California
Asco is an unincorporated community in the Amador Valley, now part of Pleasanton in Alameda County, California.
It is located on the former right of way of the Southern Pacific Railroad west of Livermore, at an elevation of 351 feet.History
The name comes from the Alameda Sugar Company, which later changed its name to Holly Sugar Company. The company raised crops there, including sugar beets, from 1899 until the mid-20th century.
