Union Pacific’s Big Boy Locomotive - World’s Largest and Most Powerful Steam Train

In this special episode, Jay Leno explores the world’s largest steam engine—the iconic Union Pacific "Big Boy." This 600-ton behemoth, originally built in 1941, is the most powerful steam locomotive ever created. Join Jay as he dives deep into the rich history, mind-blowing technology, and sheer power behind this engineering marvel. Thanks to Union Pacific and National Park Foundation for making this possible!

From inside the cab, Jay takes viewers on a once-in-a-lifetime ride, showcasing:

How this 7000-horsepower giant revolutionized American transportation
Its connection to Abraham Lincoln and the Golden Spike that united the country
Incredible behind-the-scenes stories of restoring this 80-year-old masterpiece to its former glory
Witness the raw power of steam like never before, and learn how the Big Boy continues to inspire rail fans of all ages. This is more than just a train—it's a living piece of history!

🚂 Get ready for some serious horsepower. Don’t miss this episode—it’s Big Boy time! 🚂

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#JayLeno #BigBoyLocomotive #SteamEngine #TrainHistory #UnionPacific #AmericanEngineering #Restoration #BiggestSteamEngine #RailroadAdventure #HistoricTrains #SteamPower #EngineeringMarvel #LocomotiveLegends #JayLenoGarage #Railfan #HistoricRestoration #EpicTrainRide #AmericanHistory #Trainspotting

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A new video every Monday! Visit Jay Leno's Garage, the Emmy-winning series where Jay Leno gives car reviews, motorcycle reviews, compares cars, and shares his passion and expertise on anything that rolls, explodes, and makes noise. Classic cars, restomods, super cars like the McLaren P1, sports cars like Porsche 918 Spyder and Camaro Z28, cafe racers, vintage cars, and much, much more.

[GJS]

Everytime I think you've run out of steam Jay you go and prove me wrong.

[Closet_Jedi]

This is my new favourite episode of Jay Lenos Garage.

[subjektivegaming]

Jay has a soft-spot for steam-powered machinery. I can totally understand why, looking at that incredible machine.

[DelayInBlockProductions]

This is the collaboration we’ve all been waiting for! Hats off to Union Pacific and Mr. Ed Dickens for hosting Jay. This is genius marketing across the board.

[Hyce]

So cool! Cheers to Jay and UP both for making this happen. :)

[randolphjones]

Thank you union Pacific for not destroying the big boy

[JF-xqfr]

Geez, what a pleasure to hear a person asked very technical questions, and have answers instantly and competently. What a great episode of JLG! Thanks Jay and crew!

[Hamer]

Can you imagine being in middle of nowhere Missouri, and Big Boy pulls up next to you with Jay Leno in the cab?

[persistentwind]

The most mind-blowing part to me is Jay asking questions related to and comparing / contrasting his steamers. Just unreal.

[bensipiorski]

This has got to be the best video of all time. Jay has done cars, trucks, farm tractors, and now the world’s largest operating steam locomotive. A beautiful machine.

[MrAlexwoolf]

Jay is a true American patriot, he is a real ambassador for the stuff that made America great.

[flybobbie]

As a Brit US railroads are impressive. We pulled over to watch one of those long trains pass by out in the desert. The driver blew the horn and we waved, well impressed. I like how Americans are proud of what they achieved, in UK it's beaten out of us....

[paulehlers]

As a retired UP locomotive Machinist, all I can say is OUTSTANDING--Simply OUTSTANDING! Thanks Jay & Ed!

[MBCGRS]

My Dad was a stoker on Pacific Class locomotives during WW2. He wanted a smart TV to watch Steam on YouTube but unfortunately passed before he got one. I hope someone else's Dad is enjoying this on his behalf. Thanks, Jay.

[PowerTrain]

Ed Dickens is such a treasure.

Seeing these two together really is the collaboration of a lifetime. Vive la Steam!

[dennisfahey]

Remember that Abraham Lincoln was, prior to being a politician, a railroad lawyer specializing in Eminent Domain land "procurement". He knew the game and no doubt the players who then backed him. With California and Nevada mines yielding unprecedented wealth connecting to it was a priority. The Civil War had been coming for over a decade so the "Northern Route" was chosen to secure that capital. To Lincoln's credit he also knew how the Transcontinental project could be gamed to create local monopolies. A standard trick was to have unique gauges forcing freight to play at each gauge change just for effectively right of passage. The train equivalent of a toll road if you will. Lincoln mandated a single gauge for all Federally funded tracking - eliminating that underhanded maneuver.

[charlesharper]

The tone of the whistle absolutely matches this behemoth! She beautiful!!!

[sly]

ed is irreplaceable. he knows every inch of that machine. most impressive that he remembers where every part is and its designation and its function.

[leokimvideo]

We all know this will become Jays BIGGEST video on his Garage channel. He's found the ultimate Big Boys Toy

[dragorocky]

Thank you to all the individuals who keep this locomotive preserved. It's truly a valued piece of engineering history.