Southern Pacific 8

{{short description|Preserved Narrow-gauge 4-6-0 steam locomotive}}

{{Infobox locomotive

| name = Nevada-California-Oregon
Southern Pacific 8

| image = Victorian Square, Sparks, Nevada (6402414793).jpg

| alt =

| caption = SP #8 at Sparks, Nevada

| powertype = Steam

| designer =

| builder = Baldwin Locomotive Works

| ordernumber =

| serialnumber = 31445

| buildmodel = 10-26 D 217

| builddate = 1907

| totalproduction =

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| whytetype = {{whyte|4-6-0}}

| uicclass = 2′C

| driver =

| gauge = {{track gauge|36in}}

| leadingdiameter =

| driverdiameter = {{convert|44|in|m|3|abbr=on}}

| tenderdiameter =

| minimumcurve =

| wheelbase =

| engine total =

| leading =

| drivers =

| coupled =

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| coupled all =

| coupled 1 =

| coupled 2 =

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| tenderbogieload =

| tenderaxle =

| weightondrivers =

| locoweight = {{convert|81000|lb|t}}

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| smalltubediameter =

| largetubediameter =

| boilerpressure = {{convert|180|lbf/in2|MPa|2|abbr=on}}

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| cylindercount =

| cylindersize = {{convert|16|x|20|in|mm|0|abbr=on}}

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| trainheating =

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| safety =

| coupling =

| maxspeed =

| poweroutput =

| tractiveeffort = {{convert|17,800|lbf|kN|2|abbr=on}}

| factorofadhesion =

| operator = Nevada–California–Oregon Railway
Southern Pacific Company

| operatorclass =

| powerclass =

| numinclass =

| fleetnumbers = NCO 8
SP 8

| officialname =

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| firstrundate =

| lastrundate =

| retiredate = 1954

| preservedunits =

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| currentowner =

| disposition = Display: Sparks, Nevada

| notes =

}}

Southern Pacific #8 is a {{whyte|4-6-0}} narrow-gauge steam locomotive, built by Baldwin Locomotive Works in August 1907.

It was originally built for the Nevada–California–Oregon Railway as their second #8, and was sold to Southern Pacific in 1929. She spent the rest of its career hauling passengers and freight along Southern Pacific's Keeler Branch. The locomotive, along with sisters #9 and #18 were nicknamed "The Desert Princesses", having served the desert areas of Nevada and California.{{Cite web|url=http://www.nsrm-friends.org/nsrm78.html|title=Southern Pacific Narrow Gauge #8|website=www.nsrm-friends.org|access-date=2017-08-02}}

In 1954, an GE 50 Ton diesel locomotive was purchased, relegating steam power on the Southern Pacific's narrow-gauge line to backup duty. Locomotive #8 was retired in 1955 after 48 years of service and donated to the State of Nevada. Now owned by the Nevada State Railroad Museum, it has been on display at Lillard Park at Sparks, Nevada since 1975 after negotiations of a long-term loan.{{cite web |title=Nevada State Railroad Museum |url=http://www.nsrm-friends.org/nsrm78.html |website=NSRM Friends |access-date=29 September 2022}}