BLI 10600 HO Scale Big Boy 4-8-8-4 UP 4014 250th West Coast Tour 2026 Paragon4 DCC Transponder Dirt Trac tires work well

Dirt Trac tires work well on dirt surfaces

moving wheels and stickers

Weequay Guard

Get ready to build

BLI 10600 HO Scale Big Boy 4-8-8-4 UP 4014 250th West Coast Tour 2026 Paragon4 DCC Transponder Dirt Trac tires work wellBLI 10600 HO Scale Big Boy 4 8 8 4 UP 4014 250th West Coast Tour 2026 Paragon4 DCC When railfans think of big steam, one locomotive almost always comes to mind: the Big Boy. Often regarded as the largest steam locomotive ever builtand certainly a contender for the world's most famous locomotivethe Big Boy was created to meet some of the most demanding operating requirements ever placed on a steam engine. The Union Pacific Railroad needed a locomotive