The all-heavyweight, "semi-streamlined" train ran between Bakersfield and Oakland, California (through California's San Joaquin Valley, hence the name) during the 1939–1940 Golden Gate International Exposition on "Treasure Island" in San Francisco Bay. Motive power was two Baldwin-built 1300 class 4-6-2 "Pacific" locomotives refurbished and decorated for the train. It was the Santa Fe's first attempt at streamlining older steam power.
The locomotives had metal skirting along the sides, painted aluminum (as were the nose and smokestack) with red and yellow stripes, these being outlined by black pinstripes; the tenders were similarly decorated. A yellow "Circle and Cross" emblem backed by red "wings" was emblazoned across the front of the locomotive above the pilot deck, and on each side of the tender, which also featured a red "wing." The air-conditioned rolling stock was painted aluminum with red and yellow stripes along their sills, bordered with black pinstripes (somewhat like Santa Fe's passenger diesel locomotives). Stripes on the combine unit split into two sets, with one set sweeping up to align with those on the locomotive tenders. Window shades were painted matte aluminum. The sides of the passenger cars bore "SANTA FE" in black, extra extended Railroad Roman letters. The design of the Valley Flyer's drumhead was inspired by that of its counterpart, the Golden Gate.
The first run was on June 11, 1939. The train left Bakersfield daily at 6:30 a.m. PST and arrived in Oakland at 12:35 p.m., then returned at 1:55 p.m., pulling into Bakersfield at 8:00 p.m. Beginning on October 27, 1941, the Flyer cars (save for the lounge car) were used to transport troops as a section of the San Diegan on the Santa Fe's "Surf Line" between Los Angeles and San Diego. In 1942 the trainset was discontinued and the passenger cars returned to pool service, repainted Coach Green.
The 1337 class 4-6-2 pacifics #1369 and #1376 were de-streamlined and served the Santa Fe until the early 1950s with #1376 being scrapped in 1950 and #1369 heading off to the scrapyard in 1951.
- Baldwin 4-6-2 Pacific #1369. Built in April 1913 (serial number 39566). Streamlined in 1939. Streamlining removed in 1942. #1369 was built as a four-cylinder balanced compound for mountain passenger service and rebuilt into a two-cylinder simple engine in November 1943 at the San Bernardinoshops. It retained 73-inch drivers, however increased steam pressure raised tractive force from 33,400 to 39,650 pounds. Sold for scrap on November 6th, 1951.
- Baldwin 4-6-2 Pacific #1376. Built in April 1913 (serial number 39573). Streamlined in 1939. Streamlining removed in 1942. Like her sister #1369, #1376 was also built as a 4-cylinder locomotive. Converted into a simple 2-cylinder locomotive in 1946. Sold for scrap on August 22nd, 1950.
- Combine Baggage-Barbershop-Buffet-Library #1302
- Lounge #1367
- Fred Harvey Company Diner #1467
- "Chair" car / Coach #3002
- "Chair" car / Coach #3005
- "Chair" car / Coach #3006
- Duke, Donald and Stan Kistler (1963). Santa Fe...Steel Rails through California. Golden West Books, San Marino, CA.
- Duke, Donald (1997). Santa Fe...The Railroad Gateway to the American West, Volume 1. Golden West Books, San Marino, CA. ISBN 0-87095-110-6.
- Hendrickson, Richard H. (1998). Santa Fe Railway Painting and Lettering Guide for Model Railroaders, Volume 1: Rolling Stock. The Santa Fe Railway Historical and Modeling Society, Inc., Highlands Ranch, CO.
- McGonigal, Robert S., ed. (2005). "Semi-streamlined steam stars." Streamliner Pioneers 51.
- Pelouze, Richard W. (1997). Trademarks of the Santa Fe Railway. The Santa Fe Railway Historical and Modeling Society, Inc., Highlands Ranch, CO.
- Passenger train service on the Atchison, Topeka and Santa Fe Railway