The railroads were an evolution from early pioneer Sonoma to the technology of the industrial revolution and the coming 20th Century. Trains brought new economic opportunities markets for agricultural products, tourism, and an architectural shift to modern Victorian housing as can be seen in the area around the Depot Park Museum.

After an attempt with a monorail, Sonoma Valley Prismoidal Railway by Peter Donohue, failed, the Northwestern Pacific Railroad built narrow gauge tracks to Sonoma Plaza in 1880. Followed by the extension of the tracks to Glen Ellen in 1882. Then in n 1890 after a decade, the Sonoma Plaza station was relocated to north of the Sonoma Plaza  to the current area of Depot Park, when was considered too disruptive to the town center.

A competing railroad,XXXX  avoided the ferries of San Francisco Bay providing direct transportation to eastern markets for agricultural products of the Sonoma Valley rand dimension stone from the basalt quarries in what is now Annadel State Park became a major source of freight revenue.

On May 31, 1888 the 36.7-mile line from from Napa Junction to Santa Rosa, named the "Santa Rosa Branch" and evolved into the "Sonoma Valley Branch" was completed by the Northern Railway Company. On April 14, 1898 the Northern Railway was merged into Southern Pacific. "From the earliest, it was Mark McDonald of Santa Rosa, who worked with the Central Pacific, later Southern Pacific, to connect with lines that would get his fruit to the eastern market, rather than railroad lines that headed only to San Francisco.".

the Southern Pacific Railroad on the western side of Sonoma Valley running parallel to the Northwestern Pacific railroad included the El Verano and Kenwood stations, schemes by Charles Crocker and his investors to develop new towns in Sonoma Valley. The Southern Pacific especially El Verano and Kenwood

Passenger service to Sonoma ended in 19?? And he trains ran to Sonoma bringing freight until 1965??