I never knew the D&RGW tested one of the UP's Big Boys! Especially the fact that the Big Boy tested here is Big Boy 4005, which is preserved here in Denver! Thank you for sharing this lost footage, it really helps to show the world history that happened, because history shouldn't be hidden from all of us.

THE D&RGW STILL LIVES ON!!!

POV: You suggested this video hehe 😏

I thought that the thumbnail was real.