Down town Cedarville Ca. Originally known as Deep Creek, Cedarville was founded circa 1864 as a stopping place for wagon trains. In 1867 a trading post was being run by William Cressler and John Bonner, who later also built the first road over Cedar Pass, connecting Surprise Valley to Alturas and the rest of Modoc County. The Laxague Lumber Company mill was located in Cedarville, and employed from 18 to 60 residents.