On January 16, 1911 M.O. Folsom unveiled his East Addition, Susanville subdivision containing 300 lots. Many of its north/south streets were named for trees, i.e., Ash, Cedar, Fir, Spruce. The east/west were numbered, i.e, First, Second, Third, Fourth and Fifth.

Ash Street, initially ended at Fifth Street. Travelers headed north either used Hall Street or Weatherlow Street to Chestnut. In 1947, Ash Street was incorporated into the Lassen-Modoc Joint Highway #14, the pre-cursor to State Highway 139. Ash Street was extended to connect the highway making for a straight route into Susanville.

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