Sierra No. 3

Sierra No. 3
Sierra Railway No. 3. hauling its first train on July 3, 2010, after its overhaul
Type and origin Power type Steam Builder Rogers Locomotive and Machine Works Serial number 4493 Build date March 26, 1891
Specifications Configuration: ​  • Whyte 4-6-0  • UIC 2'C Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge Leading dia. 2 ft 2 in (660 mm)[1] Driver dia. 4 ft 8 in (1,422 mm) Boiler pressure 150 psi (1,000 kPa) Cylinders Two, outside Cylinder size 17 in × 24 in (432 mm × 610 mm) Valve gear Stephenson Valve type Slide valves
Performance figures Tractive effort 17,470 lbf (77,710 N)[1]
Career Operators Prescott & Arizona Central Railway Sierra Railroad Numbers PACR 3 SRC 3 Official name W.N. Kelly Retired 1932 Restored 1948 Current owner Railtown 1897 State Historic Park Disposition Undergoing 1,472-day inspection and overhaul

Sierra No. 3, often called the "Movie Star locomotive", is a 19th-century 4-6-0 "Ten Wheeler" type steam locomotive owned by the State of California and preserved at Railtown 1897 State Historic Park in Jamestown, California.

William L. Withhuhn, the former Transportation History curator at the Smithsonian Institution, described the locomotive's historical and cultural significance:

Sierra Railway No. 3 has appeared in more motion pictures, documentaries, and television productions than any other locomotive. It is undisputedly the image of the archetypal steam locomotive that propelled the USA from the 19th century into the 20th.^[2]

Built in 1891, the locomotive returned to operation in July 2010 after a fourteen-year absence from service and a three-year-long overhaul, requiring the replacement of its original boiler. It was listed on the National Register of Historic Places in 2023.^[3]