ST. LOUIS - Missouriar -- Rail fans from across the region are invited to experience a rare railroad event as The National Museum of Transportation, home to Union Pacific Big Boy #4006, hosts a Big Boy Watch Party on Monday, July 20, in anticipation of the pass-by of the legendary Union Pacific Big Boy #4014.

Few places in the country offer the opportunity to see two Big Boys at one time. Guests will be able to visit the Museum's permanently displayed Big Boy #4006 while awaiting the arrival of the world's largest operating steam locomotive, Big Boy #4014, as it passes the Museum along Union Pacific's main line. The locomotive is expected to pass by the Museum at approximately 10:15 a.m.

"This is an opportunity that is simply not that common," said Terri McEachern, Executive Director of The National Museum of Transportation. "Whether you're a lifelong railfan or introducing a new generation to the wonder of steam railroading, seeing two Big Boys in one place is a memorable experience you won't want to miss."

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Guests are encouraged to come prepared for a summer day outdoors by bringing water, sunscreen, and a stadium chair. While waiting for the historic locomotive, visitors can enjoy live music from Gaslight Square and explore one of the nation's premier transportation museums.

The Museum's Boxcar Boutique Gift Shop is also offering a limited-edition "Two Big Boys – One Town" commemorative T-shirt, featuring the iconic Gateway Arch. Shirts are available for purchase while supplies last.

Regular Museum admission applies. Please note that the only parking available for guests is in the William R. and Laura Rand Orthwein Education & Visitor Center parking lot.

The National Museum of Transportation is located at 2933 Barrett Station Road, Kirkwood, MO 63122, and is open daily from 9:00 a.m. to 4:00 p.m. through Labor Day.

For more information, admission details, and event updates, visit www.tnmot.org.