Semi Truck Plunges Down Snowy Mountainside After Breaking Through Guardrail Bozeman Pass, Montana — December 4, 2025 A harrowing crash was caught on camera Thursday morning as a fully loaded semi truck lost control on an icy stretch of Bozeman Pass, smashed through a guardrail, and tumbled down a steep mountainside. Witnesses said the truck began fishtailing on a downhill curve coated with black ice. Moments later, the driver attempted to correct the slide, but the trailer jackknifed, pulling th