| Number | Builder | Type | Date built | Heritage | Disposition | Notes | 
|---|
| A | Plymouth | DLC6 | 1925 | HC Collins |  |  | 
| 1 | Unknown | 2-6-0 | Unknown | Prescott & Arizona Central #1 | Sold/Transferred to West Side Lumber Company as Mill Switcher |  | 
| 2 (1st) | Unknown | 4-4-0 | Unknown | Prescott & Arizona Central #2 | Scrapped circa 1899 | Only used during construction of the railroad | 
| 2 (2nd) | New York | 0-6-0 | 1889 | Northern Pacific | Sold to Lassen Lumber & Box, scrapped in 1940 |  | 
| 3 | Rogers | 4-6-0 | 1891 | Prescott & Arizona Central #3 | Donated to Railtown 1897, In Service | Known as the "Movie Star Locomotive" for its roles in many films and television shows | 
| 4 | Baldwin | 4-4-0 | 1882 | Northern Pacific #99 | Sold to Pickering Lumber as #14 and scrapped in 1938 |  | 
| 5 | Schenectady | 0-6-0 | 1899 | New | Sold to Hawaii Consolidated (converted to a 2-6-2), scrapped in 1947 | Sierra's first new locomotive. | 
| 6 | Baldwin | 4-4-0 | 1883 | Northern Pacific #144 | Sold to Atlas-Olympia, later converted to a stationary boiler and scrapped in 1937 | Primarily assigned to passenger service. | 
| 7 | Baldwin | 4-4-0 | 1882 | Northern Pacific #93 | Sold | disposition unknown, presumed scrapped. | 
| 9 | Heisler | Heisler 2-Truck | 1899 | New | Sold to Standard Lumber Company as #8, resold to West Side Lumber Co., scrapped in 1947 | Built for service on the Angels Branch. | 
| 10 | Lima | Shay 2-Truck | 1902 | New | Sold to Hofius Stell & Equipment, resold to Walville Lumber Co. then to Diamond Match Co. scrapped in 1942 | Built for service on the Angels Branch. | 
| 11 | Lima | Shay 2-Truck | 1903 | New | Sold to United Commercial Company, resold to Pickering Lumber Co., resold to Verdi Lumber Co. then to Clover Valley Lumber Co., scrapped in 1952 | Built for service on the Angels Branch. | 
| 12 | Lima | Shay 3-Truck | 1903 | New | Sold to Pickering Lumber Co., now owned by the Pacific Locomotive Association, stored serviceable | Sierra's only 3-Truck Shay. Built for service on the Angels Branch. | 
| 18 | Baldwin | 2-8-0 | 1906 | New | Sold to private owner, now stored in Merrill, OR | Tender sold to Tidewater Southern in 1952 for use with their #132 and scrapped with loco in 1955. | 
| 20 | Baldwin | 2-8-0 | 1916 | New | Sold to US Army as #6814, resold to Kurth Lumber as #20, scrapped in 1955. |  | 
| 21 | Climax | Climax 2-Truck | 1906 | New | Sold to Sugar Pine Railway as #1, resold to Grant Rock & Gravel, Stillwater Lumber, Zimmerman, Wells, Brown,Sigardson & Bartholomew Logging and finally Jamestown-Oregon Lumber Co. | Sierra's only Climax. Built for service on the Sugar Pine Railway. | 
| 22 | Baldwin | 2-8-0 | 1920 | New | Sold to California Western as #41, scrapped in 1950 |  | 
| 24 | Baldwin | 2-8-0 | 1912 | Nevada Copper Belt #3 | Scrapped in 1955 |  | 
| 26 | Baldwin | 2-6-0 | 1908 | Ocean Shore | Sold to Davis-Johnson Lumber Co., scrapped in 1939 |  | 
| 28 | Baldwin | 2-8-0 | 1922 | New | Donated to Railtown 1897, Undergoing Restoration |  | 
| 30 | Baldwin | 2-6-2 | 1922 | New | Sold to Howard Terminal Railway as #6 (rebuilt as 2-6-2T), now owned by the Pacific Locomotive Association, undergoing restoration as 2-6-2 configuration as built | Mostly assigned to the Angels Branch. | 
| 32 | Baldwin | 2-6-2 | 1923 | New | Sold to Tidewater Southern, April 1940, renumbered 132; scrapped in 1955 | Original tender wrecked 1952, replaced with tender from Sierra #18. | 
| 34 | Baldwin | 2-8-2 | 1925 | New | Sold to Reed Hatch 1962, resold to Fred Kepner circa 1987, stored at Railtown 1897. | Leased to and operated by Railtown between 1971 and 1980. | 
| 36 | ALCO | 2-8-2 | 1930 | New | Sold to Reed Hatch 1962, used on White Mountain Scenic Railroad, now privately owned in Merrill, OR | Sierra's last new steam locomotive. | 
| 38 | Baldwin | 2-6-6-2 | 1934 | Weyerhauser Timber Company #4 | Sold to Rayonier Inc., now privately owned in Merrill, OR | Sierra's only articulated locomotive. | 
| 40 | Baldwin | S-12 | 1955 | New | Scrapped in 2008 | Sierra's first Diesel. | 
| 42 | Baldwin | S-12 | 1955 | New | Stored out of service | Sierra's last new completely locomotive | 
| 44 | Baldwin | S-12 | 1951 | Sharon Steel #10 | Scrapped in 2008 |  | 
| 45 | EMD | GP9 | 1954 | Great Northern #667 | In service |  | 
| 46 | EMD | GP9E | 1957 | Southern Pacific #5731 | Sold |  | 
| 47 | EMD | GP7 | 1952 | Reading Company #607 | In service |  | 
| 48 | EMD | GP20 | 1961 | AT&SF #1162 | In service |  | 
| 50 | EMD | GP20 | 1961 | AT&SF #1130 | In service |  | 
| 52 | R.J. Corman/Railpower | RP20DB | 2014 | New | In service | Built from ex Yolo Shortline #135. | 
| 131 | EMD | GP9 | 1957 | SP #5759 | In service | From Yolo Shortline. | 
| 132 | EMD | GP9 | 1957 | SSW #823 | In service | From Yolo Shortline. | 
| 133 | Homebuilt/Railpower | RP20DB | 2012 | New | In service | Built from ex T&NO GP9 #436. | 
| 134 | EMD | GP7u | 1952 | AT&SF #2704 | In service | From Yolo Shortline | 
| 136 | EMD | GP7u | 1952 | AT&SF 2833 | In service | From Yolo Shortline | 
| 1227 | Lima | 0-6-0 | 1914 | SP | Restoration | From Golden Gate Railroad Museum | 
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