Hundreds gathered to get an up-close look at the world's largest operating steam locomotive as it made a short stop in Marysville on Thursday.

The world's largest operating steam locomotive, Union Pacific's Big Boy No. 4014, departed Sacramento on a historic coast-to-coast tour Friday in celebration of America's 250th anniversary.

Dubbed Big Boy #4014, the Union Pacific locomotive will operate a single, one-way trip through several Pennsylvania towns this summer as part of the U.S.'s 250th anniversary.

A historic steam giant will draw crowds to Ogden, as Union Pacific’s Big Boy locomotive arrives for a free public event tied ...

Union Pacific announced several new stops for Big Boy engine #4014, the world's largest operating steam locomotive, as part of a transcontinental tour celebrating the nation's 250th anniversary.

(KTXL) — Northern California residents will have an opportunity to see the world’s largest steam locomotive when Union Pacific’s “Big Boy” makes numerous stops in the state over the next several days.

Railfans and families who missed their first glimpse of the world’s largest operating steam locomotive will soon get another chance.